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FOC | Family List | FOC Vol. 25 | Orchidaceae

34. Diphylax J. D. Hooker, Hooker’s Icon. Pl. 19: ad t. 1865. 1889.

尖药兰属 jian yao lan shu

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

Herbs, terrestrial, small. Tubers ovoid to cylindric, fleshy. Stem erect, terete, short, glabrous, with 1 to several basal sheaths and 1-3 subradical leaves. Leaves lanceolate to elliptic, adaxially often with yellow or white reticulate veins, basally contracted into a petiole-like amplexicaul sheath. Inflorescence with 1 to several foliaceous sterile bracts, and with several to more than 20 secund flowers in a terminal raceme; floral bracts ovate to lanceolate. Flowers resupinate, small to medium-sized; ovary twisted, shortly pedicellate. Sepals and petals similar; sepals not widely spreading, narrowly ovate to lanceolate, subequal in size. Petals linear-oblong to lanceolate; lip usually decurved, linear-lanceolate or linear-ligulate, nearly as long as sepals, base concave, spurred, margin entire, lateral margins involute, apex acuminate; spur pendulous, urn-shaped, ellipsoid, or conic, shorter than ovary, contracted at neck. Column very short with 2 elongate lateral appendages; anther erect, 2-locular, locules contiguous, parallel; connective distinct; rostellum small to elongate; pollinia 2, clavate, granular-farinaceous, sectile, each attached by short caudicle to naked viscidia; stigma entire, large, raised. Capsule ovoid.

Three species: SW China to the Himalayas; three species (two endemic) in China.

1 Leaf oblong to oblong-lanceolate; sepals to 5 mm; lip ca. 4.5 mm; spur urn-shaped; staminodes linear, elongate, extending as far as or beyond apex of anther locules.   1 D. urceolata
+ Leaves spatulate, ovate, or elliptic; sepals ca. 7 mm or more; lip ca. 8 mm; spur ellipsoid or ellipsoid-cylindric; staminodes oblong, ovate, or obovate, relatively short, terminating below apex of anther locules   (2)
2 (1) Leaves usually 2 or 3, spatulate or lorate-spatulate, 7-13 cm; floral bracts lanceolate, longer than ovary; connective oblong at apex, clearly protruding from anther apex; lateral appendages oblong.   2 D. contigua
+ Leaf usually solitary, elliptic to ovate, 3-6 cm; floral bracts shorter than ovary; connective slightly convex at apex of anther; lateral appendages ovate to obovate.   3 D. uniformis

Lower Taxa


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