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FOC | Family List | FOC Vol. 25 | Orchidaceae

121. Conchidium Griffith, Not. Pl. Asiat. 3: 321. 1851.

蛤兰属 ge lan shu

Authors: Xinqi Chen, Yi-Bo Luo & Jeffrey J. Wood

Herbs, dwarf, caespitose, epiphytic or lithophytic, often forming mats on substrate. Rhizome creeping. Pseudobulb of 1 internode, globose, discoid, or oblong, strongly depressed, reticulate or not. Leaves 1-4, inserted at top of pseudobulbs, obovate-lanceolate, subsessile, petiole tapering, articulate. Inflorescence terminal, solitary, elongate, hysteranthous, proteranthous, or synanthous, 1- or a few flowered; peduncle filiform; floral bracts hooded, membranous. Flower white, pale green, or yellow. Dorsal sepal triangular, acuminate; lateral sepals obliquely triangular or lanceolate, acuminate, forming a distinct mentum with column foot. Petals obovate-lanceolate or oblong, acuminate or obtuse; lip entire or 3-lobed, with a claw, simple or adorned with ridges. Column with a curving foot; pollinia 8, compressed, ovoid; rostellum truncate, almost square in outline.

About ten species: Bhutan, S China, N India, S Japan, Laos, Myanmar, Nepal, Thailand, Vietnam; four species (one endemic) in China.

1 Pseudobulbs contiguous   (2)
+ Pseudobulbs borne 2-5 cm apart on rhizome   (3)
2 (1) Pseudobulbs depressed globose, discoid, 5-6 × 4-6 mm, surrounded by reticulate sheaths, congested, 2- or 3-leaved; leaves 1-2 × 0.3-0.4 cm; flowers pale green; dorsal sepal ca. 4 mm, acuminate; disk with 2 basal calli.   1 C. muscicola
+ Pseudobulbs narrowly ovoid, 10-15 × 3-4 mm, not surrounded by reticulate sheaths, 2-leaved; leaves 4-10 × 0.5-1.6 cm; flowers white; dorsal sepal ca. 8 mm, obtuse; disk with 3 lamellae.   4 C. japonicum
3 (1) Pseudobulbs 3-6 mm, ± subglobose or compressed globose, covered by reticulate sheaths; leaves 0.5-1.6 × 0.2-0.4 cm; lip to ca. 5 mm, entire, lanceolate; flowers white or pale yellow.   2 C. pusillum
+ Pseudobulbs 9-15 mm, oblong-cylindric, without reticulate sheaths; leaves 2-6 × 0.6-1.5 cm; sepals 11-18 mm; lip 10-17 mm, 3-lobed; flowers cream-colored and lavender or red.   3 C. rhomboidale

Lower Taxa


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