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FOC | Family List | FOC Vol. 25 | Orchidaceae

78. Crepidium Blume, Bijdr. 387. 1825.

沼兰属 zhao lan shu

Authors: Xinqi Chen & Jeffrey J. Wood

Fingardia Szlachetko; Glossochilopsis Szlachetko; Pseudoliparis Finet; Pterochilus Hooker & Arnott; Saurolophorkis Margońska & Szlachetko; Seidenfia Szlachetko; Seidenforchis Margońska.

Herbs, terrestrial, rarely epiphytic or lithophytic. Roots hairy. Stem cylindric to pseudobulbous, fleshy, often creeping and rooting in basal part. Leaves 2 to several, thinly textured to fleshy, plicate, petiolate, petiole sheathing at base. Inflorescence apical, erect, unbranched; floral bracts persistent, often recurved or reflexed, lanceolate or setose. Flower usually not resupinate, green, brown, yellow, pink, or purple. Dorsal sepal spreading, free; lateral sepals free or fused, spreading. Petals often narrower than sepals, free, spreading; lip erect, flat, usually concave at base, entire to lobed, auriculate at base or lacking auricles, apical margin entire or toothed, lacking a spur, callus absent. Column lacking a foot, with 2 apical arms on either side of clinandrium, rarely with a dorsal wing or protuberance; anther cap movable, dorsal, dorsiventrally flattened, attached by a slender filament, locules opening ventrally; pollinia 4, almost equal in size, in pairs, clavate, waxy, with 1 delicate viscidium or lacking a viscidium; stigma elliptic to transversely elliptic; rostellum often obtuse or rounded at apex.

About 280 species: throughout the Asian tropics and subtropics, Australasia, and Indian Ocean islands, with a few species in temperate Asia; 17 species (five endemic) in China.

1 Lip without basal auricles, narrow, ligulate, entire.   1 C. finetii
+ Lip auriculate, mid-lobe entire, toothed, or bilobed   (2)
2 (1) Lip auricles short, never stretching backward and embracing column.   2 C. ramosii
+ Lip auricles long, stretching backward and embracing column   (3)
3 (2) Lip toothed or fimbriate-toothed at apex   (4)
+ Lip 2-lobed, entire, or emarginate, never toothed or fimbriate-toothed, at apex   (6)
4 (3) Flowers dark purple or blackish purple; lip with 15-20 fimbriate teeth at apex.   3 C. orbiculare
+ Flowers dark red, orange, or yellow; lip with several teeth at apex   (5)
5 (4) Leaves 2-4; dorsal sepal distinctly longer than lateral sepals.   4 C. ovalisepalum
+ Leaves 5-8; dorsal sepal and lateral sepals nearly equal in length.   5 C. bancanoides
6 (3) Lip entire or emarginate at apex   (7)
+ Lip conspicuously 2-lobed at apex   (8)
7 (6) Lip not emarginate at apex; auricles 2-3 mm.   6 C. biauritum
+ Lip emarginate at apex; auricles 0.4-0.6 mm.   7 C. concavum
8 (6) Leaves 2, subopposite, appressed to substrate.   8 C. mackinnonii
+ Leaves often 3-7, if 2, not as above   (9)
9 (8) Leaves with colorful markings adaxially, especially stained with white near margins.   9 C. calophyllum
+ Leaves plain, without colorful markings   (10)
10 (9) Pseudobulbs subglobose; center of lip glabrous or glandular-pilose   (11)
+ Pseudobulbs cylindric, cauliform; center of lip not as above   (12)
11 (10) Center of lip glabrous.   10 C. bahanense
+ Center of lip shortly glandular-pilose.   11 C. sichuanicum
12 (10) Dorsal sepal distinctly broader than lateral sepals; basal auricles of lip resembling bat wings.   12 C. insulare
+ Dorsal sepal narrower than lateral sepals; basal auricles of lip not as above   (13)
13 (12) Lip 10-11 mm; petals 8-9 mm.   13 C. acuminatum
+ Lip 5-8 mm; petals 2.5-4.5 mm   (14)
14 (13) Lip with an indentation on either side below or near middle formed by involute margins.   14 C. khasianum
+ Lip lacking involute margins on both sides below or near middle; indentations, if present, formed by a contraction of margins   (15)
15 (14) Pedicel and ovary 6-12 mm, ca. 2 × as long as floral bracts; flowers usually red, ca. 10 mm in diam.   15 C. purpureum
+ Pedicel and ovary 5-6 mm, slightly longer than floral bracts; flowers yellow-green, yellowish, or green, rarely purplish green, 6-7 mm in diam   (16)
16 (15) Ovary 6-ridged; adaxial surface of leaves purplish.   16 C. matsudae
+ Ovary not ridged; adaxial surface of leaves greenish.   17 C. hainanense

  • List of lower taxa


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