Megaclinium
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Standard Cyclopedia of Horticulture |
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Megaclinium (Greek, large bed, because of the ample rachis). Orchidaceae. About 50 species of African epiphytic orchids, nearly all tropical, requiring the treatment given Bulbophyllum, which they resemble in habit but from which they are distinguished by having the bracts and fls. attached on either side a flattened rachis and the lateral sepals shorter than the curved free dorsal sepal: herbs with strong creeping rhizome, pseudobulbs usually globose or ovoid and bearing 1 or 2 lvs.: fls. small, yellowish, brownish, purple, variously spotted, on the almost leafy end of the scape that arises from the base of the pseudobulbs; petals smaller and narrower than the sepals; lip jointed to the foot of the column, mobile, entire, denticulate or 3-lobed; column short, winged on both sides: scape usually only a few inches high, sometimes 18 in. M. bufo, Lindl. (Bulbophyllum bufo, Reichb. f.). Rachis green, long-linear, 8-9 in. long and ½ in. wide, bearing small brownish fls. with darker spots: lip dark purple, flat, the base ovate-orbicular. Sierra Leone. G.C. 1841:348.—M. Clarkei, Rolfe. Rachis light green in center and margined and spotted purple-brown, 6-7 in. long, falcate-ensiform, obscurely repand-crenulate: fls. purple-brown specked on green; lip recurved, the base ovate. W. Trop. Afr.—M. eburneum, Pfitz. Scape as long as lvs., and rachis as long as scape and irregularly dilated: fla. and rachis yellowish white; ends of petals and the dorsal sepal yellow. W. Afr. — M. falcatum, Lindl. (Bulbophyllum falcatum, Reichb. f.). Rachis brown-green, linear-oblong and somewhat falcate, acute, thin-margined, 2-4 in. long: fls. dark brown-red on upper parts and greenish yellow on lower seams. ; lip triangular oblong, obtuse. Guinea. B. R. 989. — M. leucorhachis, Rolfe. Rachia white, 1/3 in- broad and 3 in. long, falcate-ensiform, obscurely crenulate: fls. velvety yellow; lip recurved, the broad base fimbriate. Upper Guinea. B. M. 7811. — M. lutescens. Rolfe. Scapes less than 2 in. long: rachis very narrow, 1¼in. or less long: fls. honey-yellow, small and nearly sessile: resembles M. minutum. but the rachis much narrower and the dorsal sepal acuminate. W. Afr. — M. maximum, Lindl. Rachis purple, 4-5 in. long and ½ in. wide, ensiform, undulate, the scapes 1-1 ¼ in. long with tubular sheaths: fls. purple; lip oblong, obtuse, the base broad and denticulate. Guinea. B. M. 5936 (as M. purpuratum). — M. minutum, Rolfe. Very small, the scape only 1 ½ in. long, the rachis purple-brown, oblong, crenulate, bearing about a dozen blooms: fls. dull maroon and greenish yellow, fleshy; lip cordate-ovate, obtuse, reflexed at apex. Upper Guinea. B. M. 7314. —M. platyrhachis, Rolfe. Rachis much dilated, 4-G in. long and 1 in. broad, crenulate, greenish yellow, spotted white and brown, lengthening in bloom: fls. many, yellow-green; lip fleshy and tongue-shaped, recurved, the lateral lobes small. Cent. Afr. B. M. 7946. — M. purpuratum, Lindl.— M. maximum. — M. purpureorhachis, Wildm. Large, the scapes lateral and stout, 12-14 in. long: rachis broad and flat, undulate and slightly twisted, purple-spotted: fls. brown, velvety outside; lip orbicular- ovate, recurved and obtuse, flattened. Congo. B. M. 8273. —M. scaberulum, Rolfe. Rachis dull white, shaded green and marked purple: fls. dull purple, the sepals shaded whitish green at base. . W. Extra-trop. Afr. — M. ugandae, Rolfe. Scape about 5 in. long: rachis oblong, half length of scape, light green and heavily marked with purple-brown: fls. small, with Tight green petals and sepals similar in coloring to the rachis. Uganda.
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Cultivation
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Pests and diseases
Varieties
Gallery
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References
- Standard Cyclopedia of Horticulture, by L. H. Bailey, MacMillan Co., 1963
External links
- w:Megaclinium. Some of the material on this page may be from Wikipedia, under the Creative Commons license.
- Megaclinium QR Code (Size 50, 100, 200, 500)