Laelia - Orchids - Cultivation techniques and main species of the Laelia Orchid


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LAELIA

Cultivation techniques

Pages 1- 2 -3

BOTANICAL CLASSIFICATION

Kingdom

:

Plantae

Clado

: Angiosperms

Clado

: Monocotyledons

Order

:

Asparagales

Family

:

Orchidaceae

Kind

:

Laelia

Species

: see page 2

GENERAL CHARACTERISTICS

The Laelia they are evergreen orchids originatingof the tropical areas of the rainforests, thus including a very large area that goes from Cuba to Argentina with high concentrations in Brazil and Mexico.

Some scholars (Van den Berg et al.) Argue that the species of Laelia of southeastern Brazil and the Mexican ones are two different groups of species, conclusion to which they arrived through the study of their DNA and from whose analysis, it would have emerged that the Brazilian species are more similar to the genus Sophronitis, endemic to Brazil (photo on the left) and therefore a distinction should be made between Mexican Laelia is Brazilian Laelia and call the latterSophronitis. Despite these observations, the international botanical nomenclature code of plants considers both species belonging to the genus LaeliaAs a result of this there is considerable confusion as many new names have been born on the different species.

In this article, we will follow the more traditional nomenclature while considering the fact that Mexican and Brazilian species have different environmental needs.

There Laelia is a beautiful evergreen orchid that can be found in very different shapes and sizes from very large (for example Laelia purpuratalarge 60 cm) to very small (for example the Laelia liliputana large no more than 3-5cm). They remember the Cattleya with which they once constituted a single genus but then separated as, from more careful analysis, it was shown that they are provided with from four to eight pollen sacs, unlike Cattleya which has two.

In their natural environments the Laelia grows like a plant EPIPHITE to developmentSIMPODIAL that is to say it develops horizontally and produces new rhizomes every year.

They are plants equipped with pseudobulbics and take very different shapes and sizes. For example in the Laelia Purpuratathe pseudobulbs are gathered in very dense and flattened groups.

The leaves of the Laeliathey are mostly erect and grow at the apex of the pseudobulbs in a variable number from 1-3 perpseudobulb, mostly leathery and rigid (with few exceptions).

The flowers are grouped in raceme inflorescence generally very rich in flowers that emerge from the central part of the pseudobulb producing flowers that resemble those of the Cattleya with sepals and petalides of equal size, mostly elongated and often perfumed. Some species produce up to 25 flowers per stem, and each plant can produce three or more spindle-flowering plants per season.

There are numerous hybrids on the market derived mainly from the crossing with theCattleya (Cattleya alliance). In fact, this genus is highly sought after and used for hybridizations.

In consideration of the fact that, although there are not a large number of species (50 or 75 depending on the different botanists), they are plants that grow in very different areas and habitats, so it is not possible to make a generalization on their cultivation techniques and by virtue of that, let us consider the subdivision that was made by Richard Friedrich Rudolf Schlechter, a German botanist (1872-1925) who divided the species into the following groups:

In this group we consider the Laeliawhich live in warm and humid environments during the summer and cool and dry during the winter.

This group includes the species:

  • Laelia crispa

    ;
  • Laelia fidelensis

    ;
  • Laelia grandis

    ;
  • Laelia lobata

    ;
  • Laelia perrinii

    ;
  • Laelia purpurata

    ;
  • Tenebrous Laelia

    ;
  • Laelia virens

    ;
  • Laelia xanthina

    .

From the point of view of cultivation these plants can be defined as similarCattleya and therefore refer to the chapter dedicated to her regarding cultivation techniques.In particular we can consider that they are intermediate greenhouse orchids with winter temperatures around 12-15 ° C and a dry environment and summer temperatures of 27-30 ° C and a fairly humid environment They can be grown both on suspended supports and in pots.

They are not particularly difficult to grow.

SECOND GROUP: HADROLAELIA

It is about Laelia which in nature are found above all in Brazilian grasslands and savannahs within 1000 m of altitudines.l.m. therefore areas characterized by few trees and a lot of plain.

We find the species:

  • Laelia alaorii

    ;
  • Laelia dayana

    ;
  • Laelia jongheana

    ;
  • Laelia praestans

    ;
  • Laelia pumila

    ;
  • Laelia sincorana

    .

In consideration of the fact that they are plants that live in prairies and savannahs, the climate is therefore hot and dry during the day and cold nights therefore with significant temperature fluctuations between day and night. extreme cultivation conditions that require difficult can be reproduced in a domestic environment.

I'm Laelia living in the high mountains, usually above 2000 m above sea level, areas characterized by great drought during the winter and spring months where the temperature fluctuations range from -7 ° C to + 38 ° C.

We find Mexican orchids with the only species:

  • Laelia speciosa

It is a plant with 5 cm long pseudobulbs that resemble an egg, smooth, covered with sheaths that become wrinkled with age.The leaves are 13 to 15 cm long and usually there is only one leaf per pseudobulbo, even if it is not uncommon for them to be two. They are deciduous so they last only one growing season. Usually the inflorescence develops before the new leaves and bears numerous flowers, up to 15 cm large and very long-lasting and fragrant. The sepals and hypetals are lilac in color with various shades and more or less marked tones.

No hybrids are known.

It is a very difficult orchid to keep indoors as it requires quite extreme conditions such as light and temperature. However, we give some indications of maximum:

  • light: very intense between 30,000 -40,000 lux and must be filtered in the hottest hours of the day to avoid burns;
  • air: excellent and abundant throughout the year;
  • temperatures: optimal cultivation temperatures during the summer period are around 24-27 ° C during the day and 12-13 ° C at night; in winter during the day around 19-31 ° C and at night between 3-5 ° C;
  • watering: in practice it should be watered regularly and abundantly for 4-5 months a year, that is to say in the period between late spring and early autumn; during the other periods they are drastically reduced. In any case, the essential conditions for a good success of this plant is that the soil and roots dry very quickly.
  • fertilizations: they must be done only during the period of active growth, that is to say between late spring and early autumn;
  • substrate: it is advisable to breed it as an epiphyte, on cork-like supports but it can also be grown in pots as long as the arrangement allows a quick draining of the watering water and a quick drying of the roots;
  • Flowering: the plant blooms from late spring to mid-summer.

FOURTH GROUP: MICROLAELIA

We find again Laelia typical of the Brazilian prairies in particular the

  • Laelia cattleya

    ;
  • Laelia lundii

    .

FIFTH GROUP: PARVIFLORAE or CYRTOLAELIA

In this group we find the Laeliawhich are called rupicolous that is to say they live in rocks. They are orchids with very small flowers but characterized by being very colorful.

We find the species (classification published by Pabst and Dungs in Orchidaceaebrasiliensis):

  • characterized by a mountainous habitat of monsoon type:

    Laelia brevicaulis , Laelia kautskyi, Laelia harpophylla Laelia cinnabarina; Laelia gloedenianana , L. macrobulbosa, L. mixta.

  • typical of savannas and prairies therefore a dry climate:

    Laelia angereri, Laelia caulescens, L. crispata, L. crispilabia, L. mantiqueirae, L. longipes, L. pfisteri, L. ghillanyi, L. lilliputana, Laelia lucasiana, L. malletii, L. reginae, L. blumerscheinii, L. briegeri, L. acinnamomea, L. endsfeldzii, Laelia flava, L. milleri, L. braderi, L. esalqueana, L. itambana.

  • tropical rain forest with lasola species

    Laelia bahiensis

There

Laelia harpophylla

perhaps it is the only plant that has characteristics a little different from all the others as it is not provided with succulent leaves and floral structures so that the same cultivation techniques of the Cattleyawhile for all the others it is necessary to take into account some essential factors for their survival:
  • light: they are plants that need large amounts of light;
  • temperatures: during the day the maximum must be around 27-35 ° C while the winter minimum at night must be around 11-13 ° C with even cooler temperatures during the period of formation of the flower buds to stimulate the plant to bloom;
  • humidity: they are plants that grow clinging to rocks and in periods of drought they draw water from the morning dew which dries very quickly;
  • vegetative rest: during autumn and winter they enter vegetative rest (after flowering) therefore watering during these months must be reduced to simple spraying, so as to keep the pseudobulbs turgid until spring when normal watering will resume;
  • substrate: they are epiphytic plants par excellence so if they are not bred as such, that is simply resting on suspended supports (which preferably must be positioned so that they remain horizontal), so that the roots are free to the air, use substrates and pots that ensure perfect air circulation between the roots so that they can dry out very quickly after being watered. This consideration is fundamental as in nature the roots generally settle in the crevices of the rocks where rivulets of water are formed but which, given the practically dry environment, as quickly as they are formed just as quickly disappear so the roots never remain wet for a long time. .

This group is characterized by Laelia Mexican whose natural habitats are characterized by summer monsoons and cool and dry during the winter.

  • Laelia albida

    ;
  • Laelia anceps

    ;
  • Laelia autumnalis

    ;
  • Laelia rubescens

    .

Given their natural habitat, their active growth period coincides with summer monons, therefore a very hot and very humid environment. During the winter, on the other hand, there is a dry and cold climate during which the plants enter in a vegetative rest. The main cause of death of this plant occurs during the winter period as it does not maintain a dry microclimate.

Especially the species Laelia anceps,Laelia albida is Laelia autumnalis come from very high altitudes therefore the winter climate must be even colder than the L. rubescens.

SEVENTH GROUP: CALOLAELIA

This group included only one species, theLaelia superbiens which, however, is now included in the genre Scomburkia.

GENERAL INFORMATION

After having made this presentation of the different species, located in their environments of origin, we give general indications on their cultivation which will then be adapted with the indications reported in the individual groups.

These are mostly epiphytic plants that grow on rocks, in open surfaces with free roots and the very structure of the plant, characterized by cuoiose leaves, is calibrated to live in poor environments.

If you observe the plant, even beyond the indications given by the different species, you understand how they must be bred: for example, if the leaves are very thick and leathery and with a robust cuticle, it means that they are used to living in dry and sunny environments. one part they function as a water reserve, the other is a protection against the sun. Plants that have inflorescences with particularly long steles means that they preferably grow in shady areas and "stretch" to go in search of more light.

TEMPERATURE AND VENTILATION

They are plants that mostly live in rocks, on open surfaces, therefore the first essential element, common to all, is an excellent circulation of air between the leaves and between the roots of the plant.

As regards the cultivation temperatures, please refer to the individual groups.

(For more information on the temperature and ventilation of orchids, see the article: "Temperature and ventilation of orchids").

LIGHT

As a rough indication the Laelia it requires a lot of light. Optimal values ​​are around 30,000 - 45,000 lux and even more.

(For more information on light, see the article: «Orchid needs for light»).

WATERING AND HUMIDITY

Another important aspect in the cultivation of this plant is that during the active growth period the watering must be abundant but at the same time the plant must have the possibility to dry out very quickly.

(For more information on orchid watering see the article: «Watering and humidity of orchids»).

FERTILIZATION

The Laelia they must be fertilized regularly, only and exclusively during the active period of growth as being mostly on inert materials, the mineral elements necessary for their survival must be provided with fertilizations. The fertilizers must be dissolved in the irrigation water. the fertilizations are carried out with the substratum is humid.

(For more information on how to fertilize these plants see the article: «Orchid fertilization»).

TYPE OF SOIL - REPOT

For repotting, here are the first steps to follow:

  • the orchid must have humid roots because in this way they remain more elastic and therefore are less subject to breakage;
  • all the old cultivation substrate must be removed with great care and any parts of dead roots must be cut with clean scissors and disinfected with alcohol or bleach or with flame;
  • any cut surface should be disinfected with a broad spectrum fungicide powder;
  • any vase that will host them must also have been previously well washed and disinfected with alcohol or bleach;
  • all the material used as substrate must be left to soak for several days to eliminate impurities and dust.

Once you have everything set up you need to choose the substrate type. In this case it must be borne in mind that being epiphytic plants they love above all to live free so it is preferable that they are grown simply resting on supports so that the roots are free to move in the air. So a branch, a piece of trunk, a piece of cork are certainly the most congenial arrangement for her. To fix them to the support, you must use material that does not easily degrade with humidity, so nylon or plasticized twine or, more simply, strips of nylona, ​​for example, obtained from pantyhose.

However, it is possible to breed these plants also in "pots" which must however be small in size as in those that are too large, the substrate takes too long to dry out with serious damage to the orchid.

The pots must be filled quite coarsely in order to guarantee perfect air circulation which will guarantee rapid drying of the roots. The transparent plastic pots that are normally used for orchids in this case must be enriched with many more drainage holes or you can use the practical containers for ricotta (photo on the side) which are perfect for this species.

As a cultivation substrate it is possible to use, for example, the bark of pinomischiata, pumice of medium - large size (5-15 mm) or gravel or rock pieces.

If at the time of repotting you have cut parts of the roots, wait a few days before watering because in this way you give the wounds time to heal.

(For more information on the type of soil and repotting of orchids you can consult the article: "Type of substrate and repotting of orchids").

FLOWERING

The flowers grow abundantly along the flower stems and generally bloom in spring - summer.

The flowers are typically very long-lasting and fragrant.

PARASITES AND DISEASES

As for the pathologies that can affect the orchid Laeliasee the chapter: "Disease and care of orchids".

CURIOSITY'

The genus name should derive from Roman mythology since Laeliashe was one of the six vestals of the temple of Vesta responsible for feeding the sacred fire; other versions identify the origin of the name simply with the name given to the women of the Roman family of the Laelius.

The genre Laelia was created by Lindley in 1831 with the first classified species Laelia grandiflora (today called Laelia speciosa) and established it as, while noting a similarity with the Cattleya, he noticed that they had 4 pollen sacs while the Cattleya he had two and that in each case both the flowers and the pseudobulbs were different.

ThereL. purpurata is one of the two progenitors of the famous hybridLaeliocattleya canhamiana (top photo) which was obtained from the cross between L. purpurata × Cattleya mossiae.

LANGUAGE OF FLOWERS AND PLANTS

See: «Orchids - The language of flowers and plants».

Pages 1- 2 -3


It is a Brazilian species, now extinct (or almost extinct) in nature, it continues to exist only thanks to collectors and growers. It came from the southern territory of the state of Bahia to the north of the state of Espìrito Santo in the 90s the territory where you could see it was already reduced only to the southern part of Espìrito Santo. Her natural habitat was the dense tropical forests, where she grew on tall trees almost exposed to full sun.

Laelia tenebrosa is not easy to cultivate, but by following some rules you can achieve success with this fascinating species.

Classification

Family: Orchidaceae Subfamily: Epidendroideae Tribe: Epidendreae Sub-tribe: Laeliinae Genus: Laelia Species: L. tenebrosa

Placement

Laelia tenebrosa is quite impressive and also likes high air humidity, so if we do not have an orchidarium, it is neither practical nor beneficial to place it bare-rooted. The only problem of growing in pots is the choice of substrate: this species is very predisposed to root rot if the substrate remains wet for a long time. I recommend the mixture of medium-large bark (4-5 cm) and charcoal (3-4 cm pieces) in the proportion 2: 1. Let's take into account that a substratum made in this way is very well draining, so in hot periods the wetting must be more frequent. As for the vase, it can be a transparent plastic vase, or a basket.

From May to September, when night temperatures are above 17 ° C, it is very recommended to place the Laelia tenebrosa outside the home, choosing a place protected from the direct midday sun and rain. Since this orchid needs daily fluctuations of at least 5 ° C between day and night, it can be used outdoors.

Light

This species thrives below 32000-40000 lux. The direct sun in the morning after 11 is very welcome, however, it must be shielded a little to avoid burns on the leaves. However, it is also possible to grow it under the lowest lighting levels, equal to 25000-28000 lux, but the blooms will be less frequent. The photoperiod must be 12-13 hours from January to October and 10 hours from November to December.

Air humidity

Potted specimens grow well with 60-65% air humidity, while those with bare roots need at least 80%.

Temperature

Laelia tenebrosa belongs to the intermediate-warm greenhouse orchids. Summer temperatures are 25-28 ° C during the day and 18-20 ° C at night in winter must be 19-21 ° C during the day and 13-15 ° C at night. Differences in temperatures between day and night of 5-9 ° C are essential.

Wetting

The development of this orchid is divided into three periods: the growth period (February to September), the intermediate period (October-November) and the rest period (December-January). During the growing period the orchid gets wet frequently (when the substrate has dried very well, but before it becomes completely dry), even every day if the plant is placed outdoors and the substrate dries out within a day . After the maturation of the new pseudobulbs (usually in September, when the first drops in temperatures occur) the quantities of water are reduced a little, but there must be vaporizations on the leaves and on any aerial roots, which imitate dews . In October-November the orchid gets wet so that the substrate remains completely dry for 2-4 days between one wetting and the next, the daily vaporizations always present. In December-the first part of January the dry period must be longer, from 7 to 10 days, the daily vaporizations of the stem always carried out, every 2-3 days light (but really light) vaporizations on the surface of the substrate are allowed . In January / February, with the increase in light (which in January must reach 12 hours a day), the orchid should show the first signs of awakening: start producing the flower stems or the new pseudobulbs. As soon as new growth is seen, the wetting must return to summer levels.

If you spend the winter rest there is excessive wrinkling of the pseudobulbs (more than 30% loss in mass), you need to slightly increase the frequency of wetting.

Fertilizer

From March to September, Laelia tenebrosa is fertilized every 4 times (but not more than once a week), using 1/4 of the dose indicated on the bottle of a special liquid fertilizer for orchids. For bare root specimens, the dose should be lower: 1/8 every week. In October-November the fertilizations are reduced to once a month, while in the rest period they are suspended completely.

Remember that before fertilizing the orchid, it must be wet: the fertilizer applied to dry roots causes damage to their surface.

Flowering

The floral stems develop after the resting period and come out from the tips of the pseudobulbs matured in the last season. Each inflorescence bears 2-3 very large flowers, 15-20 cm in diameter. If the adult orchid does not bloom after the rest period, it is likely that the last pseudobulbs have not developed the corresponding bud that produces an inflorescence. This happens if the intensity of light during the growth period was not high enough.

Where to buy it

Fortunately, Laelia tenebrosa is quite available in European catalogs and is found both in Italy (Nardotto and Capello) and abroad (Schowerter Orchideenzucht, etc.).


Vegetative cycle

To have a correct development and regular blooms, Laelia briegeri needs a winter rest period of about 2-3 months. In this period (from December to February) the daytime temperatures must be + 21-23 ° C and the nighttime temperatures of + 10-11 ° C, thus guaranteeing a daily change of 10-11 ° C. In nature, rains are almost absent in winter, but water is still available from other sources such as dews and mists. In cultivation, the wetting is replaced with light vaporizations about once every 2-3 days, while the humidity of the air around the plant must not drop below 70%.


A rock orchid, much desired and equally feared by collectors.

Guido De Vidi Collection - photo 08.09.06 - rights reserved


Laelia cinnabarina Bateman 1847 subgenus Parviflorae section Parviflorae Lindley

I have been growing this species for over 10 years on a wooden raft (it would be more correct to say vine stock) without ever moving it.

From year to year it forms new vagetations that bloom regularly, while the old ones of a few years gradually die out.

Basically the natural biological cycle has been created: the old part of the plant dries up and creates a kind of self-protection for the roots and new pseudobulbs.

In the photos on the left you can admire the bright red flowers and the stump on which mine Laelia cinnabarinalives (with some period of crisis due to my mistakes) ... since the beginning of the 90s.

Laelia cinnabarina Bateman 1847 subgenus Parviflorae section Parviflorae Lindley

Synonyms :Amalia cinnabarina (Bateman ex Lindl.) Heynh. 1846 Amalias cinnabarina [Batem. ex Lindl.] Hoffmansegg 1842 Bletia cinnabarina [Batem. ex Lindl.] Rchb.f 1861 Bletia cinnabarina var sellowii Rchb.f 1863 Bletia cinnamomea (Rchb.f.) Rchb.f. 1862 Cattleya cinnabarina [Batem. ex Lindl.] Beer 1854 Hoffmannseggella cinnabarina (Bateman) H.G. Jones 1968 Laelia cinnamomea Rchb.f. 1860 Sophronitis cinnabarina (Bateman ex Lindl.) C. Berg & M.W. Chase 2000

A Brazilian species (Minas Gerias, of Sao Paulo and Rio de Janeiro at altitudes of 800 - 1500 meters) lithophyte with sympodial development. It is structured with 30 centimeter, cylindrical, unifoliated pseudobulbs (only rarely 2 rigid and fleshy lanceolate leaves). The erect flower stems measure even 40-50 centimeters and form a panniculus of stylized flowers (5-15), of variable color, generally purple red.
With regard to cultivation techniques, rivers of words have been written for this, like all other "rupicolous", both to support the ease of cultivation and to demonstrate the opposite.
Most rock orchids live in very harsh conditions, almost at the limit of vital conditions, but paradoxically it is these particularities that create an aura of mystery around them.
The two conditions required for the Laeliae rupicolous are: a lot of light and the possibility of driving and suspending the wetting.

In nature, rock orchids are subjected to dry and fresh seasonal cycles, during which they go into vegetative rest and this is precisely their Achilles' heel in crops: misplaced wetting can be fatal actions for their survival.

That said, each of us can try his hand at the arrangement that he deems most suitable: raft, vase, composed of bark, inert, rock, lapillus, perlite, pumice, seramis and so on and so forth, it will always be important to keep the plant dry, when he does not want to drink and let it dry between the wets.


A very popular species in Mexico, also known as monjita blanca (white nun)
The genre
Laelia Lindley… read this post too
Gen.Sp.Orchid.Pl. 96,115(1831).
Subfamily: Epidendroideae
Tribe: Epidendreae
Sub-tribe: Laelininae
Etymology of the name: orchid dedicated to Laelia (Roman mythology) one of the six Vestals who fed the sacred fire of the temple of Vesta (goddess of the hearth) - in Greek mythology Hestia, daughter of Cronus and Rhea. Laelia is also the name given to the females of the Roman Laelius family.
Type species: Laelia grandiflora
Basionimo: Bletia speciosa Kunth
Synonymous: Laelia speciosa (Kunth) Schlechter

… The monjita blanca

Laelia albida Bateman ex Lindl. 1839
Subgenus: Laelia
Section: Podolaelia Schlechter
Synonyms: Amalia albida (Bateman ex Lindl.) Heynh. 1846 Bletia albida Rchb.f 1862 Cattleya albida Beer 1854 Laelia candida Lodd. ex W. Baxter 1850 Laelia discolor A. Rich. & Gal. 1845

Laelia albida Bateman ex Lindl. described in "Botanical Register" (1839). The species epithet derives from the Latin albidus in the sense of "whitish".
This species was discovered in 1832 by Count Karwinski in the State of Oaxaca (Mesico). The discovery was facilitated thanks to the obvious difference in color compared to other species known at that time.
James Bateman chose the name 'albida' to highlight the white color of the flower of this new species. At the time of publication it was an absolute novelty: all sorts of Laelia then known, they had pink or lilac flowers.
Laelia albida is almost always epiphytic, rarely lithophyte. The plant produces groups of pseudobulbs of 3-4 cm in length (plants in site), 5-8 cm (plants in cultivation), elongated, ovoid, which become wrinkled when they are old. At the apex of the pseudobulbs, 2 or 3 linear leaves grow, lanceolate, rigid like leather, dark green in color, 10-20 cm long.
The inflorescence is arched and can even reach 40-60 cm in length, leading to 5 to 12 flowers at its apex. The flowers measure 3 to 5 cm and give off a strong honey-flavored scent. The sepals and petals are white or cream, sometimes the tips are tinged with pink. The labellum is white, pale pink and deep pink in the center with three parallel central yellow streaks. The base of the lip may be lined with red-purple spots.
L. albida it is native to Mexico, where it is relatively common over a large area in the states of Sinaloa, Durango, Nayarit, Jalisco, Michoacán, Guerrero, Oaxaca, and Puebla. It grows at altitudes from 1300 to 2600 meters in dry, mixed forests of pine and deciduous trees, especially on evergreen oaks, sometimes on yuccas, more rarely on rocks. Native plants in the northwestern part of Mexico produce short inflorescences that hardly exceed the length of the leaves and the flowers are small in size. Plants from the Oaxaca region have a great variation in flower color, with the labellum ranging from white, pink or dark pink. In some locations, varieties with completely pink flowers (fma. Rosea) grow with a dark pink lip, there is also a salmonea form with pink sepals and petals.
Laelia albida it is to be considered a plant of difficult reproduction and cultivation. The collection of this species is protected and regulated by a specific legislation (NOM-005-RECNAT-1997), which establishes procedures, criteria and related specifications to be able to legally obtain plants.

Cultivation
Laelia albida in cultivation it assumes dimensions and morphological characteristics different from those "on site". The main reasons are attributable to the richer diet and the changed light conditions both in terms of intensity and duration.
A division of Laelia albida arrived in my collection in the mid-80s, coming from the "Orquideas Mexicanas" nursery, it immediately distinguished itself for the enormous growth of new pseudobulbs (certainly more than double those developed on site) and for a relative ease of development.
Sin dal suo arrivo è stata sistemata su zattera e posta sulla parte alta della serra a temperatura intermedia (15 gradi minimi e 30 massimi).
Dopo un periodo di buon sviluppo iniziò a manifestare i primi sintomi di quella che spesso definisco “crisi dell’esemplare”, e anno dopo anno iniziò la sua fase regressiva, fino a bloccare lo sviluppo.
La cosiddetta “crisi dell’esemplare” aggredisce le piante quando raggiungono la loro massima possibilità vegetativa.
Mentre in natura, trovano nuovi spazi e magari si dividono, dando vita a nuove colonie, in coltivazione sono obbligate a svilupparsi su se stesse e non tutte le specie accettano questa situazione. Il problema è quello di stabilire il momento improcrastinabile della “divisione”… facile a dirsi!
Quella volta intervenni con un’energica divisione degli pseudobulbi. Durante le operazioni di divisione della pianta potei notare che le radici non riuscivano più a svilupparsi in modo efficace (questo era il motivo della crisi). I periodi critici per la Laelia albida sono essenzialmente due: un periodo di riposo semi secco dopo la fioritura ed una fase di controllo delle bagnature durante il primo periodo della crescita dei nuovi pseudobulbi (l’acqua che rimane fra le guaine basali dei nuovi germogli è pericolosa), onde evitare marciumi letali. Conviene non concimare durante la fase di semi riposo.

Note storico scientifiche
Laelia albida, conosciuta con il nome popolare di “monjita blanca”, nei luoghi di endemicità è molto comune ed è utilizzata per ornamenti floreali nelle feste e nelle ricorrenze religiose. Le colonie presenti nella valle de Zapotitlan e nella Valle de Salinas, che fanno parte della “Riserva della Biosfera Tehuacán-Cuicatlán”, la monjita blanca ha ancora un uso tradizionale nella festività di tutti i Santi.
In passato è stata usata anche per scopi medicinali. Gli usi tradizionali, sia ornamentali che medicinali, fanno sì che questa, ed anche altre specie di Laelia di origine messicana, siano da tempo raccolte per essere coltivate nei giardini ed in ogni altro posto abitato. Questo fenomeno è stato oggetto di uno studio scientifico e le ricerche evidenziarono una marcata divergenza biologica fra le varie popolazioni di Laelia albida, da sito a sito, ma anche rispetto a quelle coltivate nei luoghi antropizzati. Purtroppo, probabilmente a causa della raccolta incontrollata, lo studio rilevò una progressiva recessione delle colonie in sito.
Per questo motivo si cercò di individuare una strategia comune per conservare la specie, sia in sito che nei luoghi di coltivazione. Il principale obbiettivo degli studiosi fu quello di divulgare i risultati della ricerca allo scopo di sensibilizzare le popolazioni locali, sulla necessità di salvaguardare l’habitat naturale di questa orchidea e nello stesso tempo di approfondire le conoscenze botaniche e biologiche utili alla coltivazione ed alla propagazione estensiva.
I risultati di questa iniziativa, che ha visto protagoniste due associazioni locali, si potranno apprezzare nel prossimo futuro.

Riferimenti:
Illustrated Dictionary of ORCHID GENERA – The Marie Selby botanical Garden
Bechtel, H., Cribb, P. & E. Launert. (1992).
Halbinger, F. (1993). Laelias de Messico . Asociación Mexicana de Orquideologia, Messico.


FIORITURE INVERNALI DI CASA LAELIA - GIORCHIDEA, In continuo aggiornamento

Visto che abbiamo delle orchidee con boccioli pi o meno sviluppati, abbiamo pensato di inserire le foto man a mano che i fiori si aprono.

Ecco il primo che sbocciato proprio ieri mattina, il cycnoches che Gio aveva comprato da Glanz in Germania nella mitica spedizione!
Agli esperti chiediamo: vero che questi fiori possono essere maschili o femminili? Nel caso, dobbiamo mettere fiocco rosa o azzuro? A vuoi la sentenza!

CYCNOCHES CHLOROCHILUM x CYCNOCHES HERRENHUSANUM

Aggiungo solo una foto, spero vi piaccia..

Ecco il Den. Aberrans che sta schiudendo i boccioli in questi giorni

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Cavolo che brave. Complimenti,sono entrambe bellissime.
Per toglierti la curiosit ho cercato in internet riguardo ai fiori del CYCNOCHES.Ti copio qui quello che ho trovato:

I fiori dei Cycnoches, sono sia unisessuati, oppure con entrambi i sessi, ma non ermafroditi. Generalmente i fiori maschili sono di pi di quelli femminili si differenziano per la loro lunga colonna inoltre, hanno i pollinia dotati di una vera e propria molla, che funge loro da motore per essere lanciati verso gli insetti impollinatori

Grazie!
Ecco una foto dove si vede l'intera piantina del Den. Aberrans . molto piccolo, ma porta ben sei grappoletti di fiori.. una vera forza della natura! ..Molto bello il fatto che rifioriscano anche le vecchie vegetazioni e che sia lentissimo nell'aprire i fiori (cos si godono di pi !).

Ecco le nostre ultime novit :

Oerstedella centradenia fiorita, sia quella in vaso.

Sia quella su zattera.

I fiori di quella su zattera, che teniamo nella serretta, sono molto grandi e di colore abbastanza intenso, mente quelli della pianta madre sono pi piccoli e tententi quasi al bianco. interessante come i due diversi modi di coltivazione influiscano sulla fioritura!

Ecco, poi, una foto della Brassia che tutti conoscete. ci piace molto, soprattutto per il suo profumino speziato!

Qui di seguito i nostri acquisti da Schullian. ci siamo date alla pazza gioia anche questa volta! eheheh

Dinema (encyclia) polybulbon

Dendrochiulum graciliscarpum. profuma di frutta acerba!

Schoenorchis gemmata . anche lei lievemente profumata!

E per finire ci siamo prese tre Phal botaniche: Pulchra (prima foto a sinistra), Mariae (prima foto a destra) e Schilleriana!

Decisamente spese pazze anche noi. ma siamo contente dei nostri acquisti!
Speriamo che si ambientino bene .. ovviamente ogni suggerimento sempre ben accetto!


Video: Laelia species


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