AFRICAN

ORCHIDS

Read more of cultivation of Grammangis ellisii (Lindl.) Rchb.f.
Culture:
Light:
2000-3000 fc. Light should be filtered or diffused. Strong air movement should be provided at all times. Growers report that these plants will adapt to even brighter conditions, but they will burn if strong air movement is not provided.
Temperatures:
Summer days average 77-78F (25-26C), and nights average 65-66F (19C), with a diurnal range of 12F (7C). Because of the range in habitat elevation, these plants should adapt to conditions 6-8F (3-4C) warmer or cooler than indicated.
Humidity:
80-85% year-round.
Water:
Rainfall is very heavy most of the year with a somewhat drier period in spring. Plants should be watered heavily while actively growing, but drainage must be excellent and the roots should be able to dry rapidly after watering. Conditions around the roots should never become stale or soggy.
Fertilizer:
1/4-1/2 recommended strength, applied weekly when plants are actively growing. Many growers prefer to use a balanced fertilizer throughout the year, but others prefer to use a high-nitrogen fertilizer from spring to midsummer, then switch to a high-phosphate formula in late summer and autumn.
Rest period:
Winter days average 67-69F (19-21C), and nights average 56-58F (14-15C), with a diurnal range of 10-12F (6C). Growers are reminded that because of the range in habitat elevation, these plants should adapt to conditions 6-8F (3-4C) warmer or cooler than indicated. Rainfall in the habitat is somewhat lower in spring, but there is not an actual dry season. Water may be reduced somewhat in winter for cultivated plants, particularly those grown in the dark, short-day conditions common in temperate latitudes. They should never dry out completely, however. Fertilizer should be reduced or eliminated when water is reduced.
Growing media:
Plants may be grown in well-drained containers or mounted on bark slabs. Mounted plants need high humidity, however, and during hot, dry weather, they may require several waterings a day. Many growers find it difficult to keep mounted plants moist enough, so plants usually are grown in well-drained containers filled with a fast draining medium. Hillerman and Holst (1986) recommend a potting in 6-10 in. (15-25 cm) pots filled with fir bark. Many growers prefer to use a fir bark based mix with chunky perlite added to help keep the medium open and also retain some moisture. In dryer regions, chopped sphagnum moss may also be added to the mix. Charcoal when added also helps hold the medium open and keeps it from becoming sour. Plants should be repotted immediately if the medium starts to break down or once every few years if the plant outgrows its pot. Repotting done just as new roots start to grow enables the plant to become reestablished in the shortest possible time.
References:
This information is quoted from a Charles and Margaret Baker culture sheet, with permission from Troy Meyers This email address is being protected from spambots. You need JavaScript enabled to view it.. The entire culture sheet can be obtained by subscription from Orchid Species Culture, http://orchidculture.com











Grammangis spectabilis Bosser & Morat, Adansonia, n.s., 9: 303 (1969).
Description:
Plante épiphyte, 1 rhizome ligneux, épais; racines charnues, glabres. Pseudobulbes contigus, vert grisâtre, oblongs, tétragones, glabres, munis à leur base de fibres provenant de la désagrégation des gaines, ayant, au-dessus du milieu et vers le sommet, 2-3 anneaux brunâtres, cicatrices des insertions des anciennes gaines. Pseudobulbes jeunes portant à leur sommet 3-5 feuilles loriformes, dressées ou plus ou moins infléchies; pseudobulbes plus âgés dépourvus de feuilles. Feuilles vert sombre, glabres, un peu épaisses et chartacées, plissées longitudinalement, aiguës au sommet, longuement rétrécies sur la base et articulées sur la gaine. Pseudobulbe florifère se développant en même temps que l'inflorescence. Inflorescence en grappe; pédoncule glabre, aplati, de 40-45 cm de long, muni à sa base de 4-5 gaines imbriquées, vertaes, glabres, striées nervées, se résolvant finalement en fibres, et portant 6-7 gaines caulinaires, lâches, lancéolées aiguës. Grappe de 15-20 fleurs, à axe glabre et un peu aplati; bractées florales trinervées, lancéolées aiguës, de 2 cm de long à la base, décroissant de taille vers le sommet, plus courtes que II'ovaire. Fleur charwe; sépales oblongs aigus à sommet rhcurvé et marges un peu révolutées, jaunes plus ou moins lavé de pourpre sombre surtout vers les marges, sommet pourpre sombre; pétales oblongs aigus, blancs et tachés de pourpre sombre au sommet récurvé; labelle trilobé, muni 1 la base d'un court éperon obtus, lobes basaux arrondis, dressés, lobe terminal oblong à sommet aigu et récurvé; base du labelle ornéd'une carène médiane tabulaire, se prolongeant jusqu'au milieu de la longueur, et se résolvant partir de là vers l'avant en 3 côtes en relief, moins élevées; de chaque côté de la carène 4-5 côtes en relief suivant les nervures; sur le lobe terminal, côtes pourvues d'appendices filiformes; labelle blanc, teinté de rose violacé entre les côtes, appendices blancs.
Help wanted to an English translation, please write to me, if you know where this can be found.
Habitat:
In seasonally dry, deciduous forest or woodland at elevations of 300 to 800 meters.
Distribution:
SW. Madagascar
Reference:
Orchids of Madagascar Hermans 2007; Field Guide to the Orchids of Madagascar Cribb & Herman 2009; Conserving Grammangis spectabilis Landy Rajaovelona and Lauren M Gardiner report on a project to save this critically endangered orchid from south Madagascar
Images:
Click on each image to see a larger version.

In culture In culture In culture
Grammangis spectabilis 01 Grammangis spectabilis 02 Grammangis spectabilis 03
Photograph© Lourens
Grobler. Image used
with kind permission.
Photograph© Lourens
Grobler. Image used
with kind permission.
Photograph© Lourens
Grobler. Image used
with kind permission.

















 

 

 

Grammangis ellisii (Lindl.) Rchb.f., Hamburger Garten- Blumenzeitung 16: 520 (1860).
Homotypic Names:
Grammatophyllum ellisii Lindl., Bot. Mag. 86: t. 5179 (1860).
Gabertia ellisii (Lindl.) Gaudich. in B.Stein, Orchid.-Buch: 266 (1892).
Heterotypic Synonyms:
Grammangis ellisii var. dayanum Rchb.f., Gard. Chron., n.s., 14: 326 (1880).
Grammangis fallax Schltr., Orchis 9: 120 (1915).
Description:
A large sympodial epiphyte. Plants produce white roots that are 0.1-0.2 in. (0.3-0.5 cm) in diameter.
Pseudobulb/stem:
10-20 cm long by 1.6-2.4 in. (4-6 cm) in diameter. The younger pseudobulbs are covered with sheaths that have sharp points at their tips. Hillerman & Holst (1986) report that old plants may have 15-20 old pseudobulbs that become quite black after losing their sheaths and that they often send up a mass of stiff, fine, white roots that resemble "stickers" about the base of the pseudobulbs.
Leaves:
30-45 cm long by 0.6-2.0 in. (1.5-5.0 cm) wide. Three to five leaves are carried at the apex of the pseudobulb. They are thin and rather soft with blunt, very slightly bilobed tips. Older plants often have leaves on 5-6 of the pseudobulbs.
Inflorescence:
40-65 cm long and up to 0.3 in. (0.7 cm) in diameter. The flower spike forms on a new lead before the pseudobulb has developed and when the leaves are 8-10 in. (20-25 cm) long. Flowers are produced in a raceme that is 6-8 in. (15-20 cm) long toward the apex of the spike. Flowers are formed at all angles around the stem and are spaced about 0.6 in. (1.5 cm) apart.
Flowers:
15-20 per inflorescence. The flowers, which open progressively, are 2.0-2.4 in. (5-6 cm) wide and measure about 1.2-1.4 in. (3.0-3.5 cm) vertically. The spreading to somewhat reflexed, triangular sepals are the most prominent part of the flower. They are about 1.6 in. (4 cm) long by 0.8 in. (2 cm) wide near the base and have reflexed, somewhat undulate margins. The smaller petals are also triangular in shape but are smaller than the sepals and are held to project forward on each side of the column for most of their length with their upper margins meeting above the column. They flare out slightly near their sharply pointed tips. in. ( cm) across. The egg-shaped lip is about 0.7 in. (1.8 cm) long and wide, but it is so concave that in its natural position it measures only about 0.4 in. (1 cm) wide. It is flattened at the base and is 3-lobed at the apex. The lateral lobes are sharply pointed to sickle-shaped, and the middle lobe is slightly longer and narrower. There is a callus at the base of the middle lobe that is 2-toothed at its apex and has a median keel that divides the base of the middle lobe into 3 short crests. The column is about 0.4 in. (1 cm) long with triangular to bluntly pointed ear-like appendages that are widely extended.
Habitat
Plants grow in coastal forests, in humid evergreen forests, and on branches overhanging rivers from near sea level to about 4250 ft. (1300 m).
Notes:
Growers report that plants are in bloom for a long time.
Culture:
Read more of cultivation of Grammangis ellisii (Lindl.) Rchb.f.
Distribution:
N. & E. Madagascar. Found in the provinces of Antananarivo, Antsiranana, and Toamasina.
References:
De la Bathie, H., and H. Humbert. [1939, 1941] 1981. Flora of Madagascar 1-2. The Government of Madagascar and the National Museum of Natural History, Paris. Translated and published in 1 vol., Steven D. Beckman, 621 Palm Ave., Lodi, CA, U.S.A. 95240. Du Puy, D., P. Cribb, J. Bosser, J. & C. Hermans. 1999. The Orchids of Madagascar. The Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB, England. Hamilton, R. 1988. When does it flower? 2nd ed. Robert M. Hamilton, 9211 Beckwith Road, Richmond, B. C., Canada V6X 1V7. Hillerman, F. and A. Holst. 1986. An introduction to the cultivated Angraecoid orchids of Madagascar. Timber Press, Portland, Ore. Kew Data Base. 2020. http.//apps.kew.org/wcsp/home.do
Images:
Click on each image to see a larger version.

In culture In culture In culture In culture
Grammangis ellisii  01 Grammangis ellisii  02 Grammangis ellisii  03 Grammangis ellisii  04
Photograph© Lourens
Grobler. Image used
with kind permission.
Photograph© Lourens
Grobler. Image used
with kind permission.
Photograph© Lourens
Grobler. Image used
with kind permission.
Photograph© Lourens
Grobler. Image used
with kind permission.










 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Key to the species of Grammangis Rchb.f.

1 Labelle à lobe médian deltoïde glabre; sépales en général de plus de 3 cm de long G. ellisii
2 Labelle à lobe médian oblong, p;ortant sur les côtes des appen dices filiformes; sépales n'atteignant pas 3 cm de long G.spectabilis

World Checklist of Monocotyledons. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/monocots/ accessed 01/01/2015