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Flora of Taiwan | Family List | Orchidaceae

Luisia Gaud.


Epiphytic herbs. Stems tufted, slender, terete, rigid, surrounded by closely appressed tubular sheaths of leaf. Leaves well-spaced, terete, slender, articulated with sheath at base. Racemes lateral, few-flowered; rachis thickened. Flowers fleshy, perianth spreading; sepals free, similar, lateral ones often keeled; petals similar to sepals or +/- longer and narrower; lip sessile, from base of column, not movable, fleshy, base concave or shallowly saccate, usually 3-lobed, lateral lobes often erect, midlobe larger, often sulcate or grooved longitudinally, entire or with small lobules at apex; column thick, without foot; anther terminal, operculate; pollinia 2, waxy, subglobose, porate or short cleft, connected by elastic thread to broad stipe, viscidium perpendicular to stipe; stigma entire, broad, concave; rostellum broad.

About 50 species, from Korea, Japan, the Ryukyus, through China, the Himalaya and southeast Asia, to Papua New Guinea and New Caledonia. Three species in Taiwan.


1 Petals linear, 2 mm wide; midlobe of lip cordate, without lobes at apex.   Luisia cordata
+ Petals oblong, more than 4 mm wide; midlobe of lip not cordate, with minute lobes at apex.   (2)
2 (1) Leaves 10-20 cm long, 2-3 mm in diam.; lateral sepals nearly equal to or larger than dorsal sepal, 8-12 mm long; lip 10-14 mm long, yellowish green, with brownish purple stripes or spots, surface nearly smooth.   Luisia teres
+ Leaves 6-10 cm long, 2.5-4 mm in diam,; lateral sepals shorter than dorsal sepal, 12-16 mm long; lip 13-18 mm long; almost entirely dark purple, surface distinctly reticulate sulcate.   Luisia megasepala

Lower Taxa

Related Synonym(s):


Related Objects  

Flora of China  
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