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FOC | Family List | FOC Vol. 25 | Orchidaceae

12. Myrmechis (Lindley) Blume, Coll. Orchid. 76. 1859.

全唇兰属 quan chun lan shu

Authors: Xinqi Chen, Stephan W. Gale & Phillip J. Cribb

Anoectochilus sect. Myrmechis Lindley, Gen. Sp. Orchid. Pl. 500. 1840; Tubilabium J. J. Smith.

Herbs, terrestrial or rarely epiphytic, small. Rhizome elongate, creeping or decumbent, several noded, fleshy; roots hairlike, arranged in irregular clumps or ridges along rhizome internodes. Stem ascending, terete, glabrous, with few to many scattered leaves. Leaves green, ovate or orbicular, small, usually less than 2 cm, slightly fleshy, base shortly petiolate and dilating into tubular amplexicaul sheath. Inflorescence abbreviate or occasionally elongate, glabrous to pubescent, with a few sheathing bracts proximally and 1 to few flowers in a short terminal raceme. Flowers not opening fully, resupinate, small; ovary erect, twisted, glabrous to pubescent. Sepals similar, glabrous to pubescent on outer surface, free or basally connate; dorsal sepal often concave at base; lateral sepals oblique, concave, enclosing base of lip. Petals oblong to elliptic, margin oblique to subequal, connivent with dorsal sepal and forming a hood though apex usually free; lip basally adnate to column margin, 3-partite; hypochile saccate, containing a single, fleshy, entire or divided callus on either side of midvein at base; mesochile elongate, margin involute, subtubular, glabrous or pubescent; epichile transversely dilated or distinctly 2-lobed. Column very short, ventrally with 2 ligulate to longitudinally transverse, low wings; anther ovoid, 2-locular; clinandrium shallow; pollinia 2, 2-partite, granular-farinaceous, sectile, basally attenuate and attached to a solitary, elliptic viscidium; rostellum erect, short, 2-lobed; stigma lobes partly free at apical corners of column, protruding from lateral margin of rostellum.

About 15 species: NE India and the E Himalayas to S Japan, the Philippines, SE Asia, and New Guinea; five species (three endemic) in China.

1 Lip T-shaped, epichile transversely dilated but not divided; petals with equal margins and an obtuse apex (neither oblique nor apiculate at apex)   (2)
+ Lip Y-shaped, epichile divergently 2-lobed; petals distinctly oblique and obtuse at apex, or with equal margins and an apiculate apex   (3)
2 (1) Lip ca. 7 mm; hypochile calli oblong; epichile transversely oblong to obtriangular, 3-3.5 mm wide, entire.   1 M. japonica
+ Lip ca. 5 mm; hypochile calli subquadrate; epichile transversely obcordate-obovate, 1-1.5 mm wide, occasionally slightly emarginate.   2 M. chinensis
3 (1) Petals broadly urceolate, with equal margins, apex abruptly narrowed into an apiculate, oblong tip ca. 1 mm, ca. 3.5 mm wide.   4 M. urceolata
+ Petals narrowly ovate or oblanceolate, oblique, apex obtuse, less than 3 mm wide   (4)
4 (3) Lip 10-12 mm; mesochile minutely papillose, margin entire.   3 M. drymoglossifolia
+ Lip 7-8 mm; mesochile glabrous, margin minutely crenulate.   5 M. pumila

Lower Taxa


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