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FOC | Family List | FOC Vol. 25 | Orchidaceae

123. Cylindrolobus Blume, Fl. Javae Praef. vi. 1828.

柱兰属 zhu lan shu

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

Ceratium Blume, Bijdr. 342. 1825, not Schrank (1793), nor Albertini & Schweinitz (1805).

Herbs, epiphytic or rarely terrestrial. Stems elongate, slender, usually not pseudobulbous, but in some species a few terminal internodes sometimes slightly swollen, with leaves along entire length, except for a few nodes at base where persistent leaf sheaths are found, or with only a few leaves toward apex. Leaves alternate, conduplicate, linear-oblanceolate, narrowly elliptic, or narrowly ovate, leathery, articulate to a sheathing leaf base tightly enveloping stem. Inflorescences lateral on many nodes or arising from terminal node of stem, usually short and slender, only 1- or a few flowered; peduncle usually very much reduced; floral bracts few, spirally arranged, in some species conspicuous, brightly colored, fleshy. Flowers mostly white or cream-colored, sometimes ochre-yellow, medium-sized, glabrous or sparsely stellate-hairy on abaxial surface of sepals; pedicel and ovary glabrous. Dorsal sepal free, often recurved; lateral sepals oblique at base, forming with column foot a blunt, oblique mentum. Petals free, smaller than sepals; lip 3-lobed, hinged to column foot, curved, adorned with a papillose, subglobose callus and papillose keels, or only with laminate keels; lateral lobes erect, enclosing column; mid-lobe in most species smaller than lateral lobes. Column short, foot shorter than or ca. as long as column proper; pollinia 8, rectangular, arranged in a series of pairs, 1 large and 1 small, posterior 4 much smaller.

About 30 species: SW China, Indochina, Indonesia, Malaysia, Myanmar, Philippines, Thailand; three species (one endemic) in China.

1 Stems slender, terete, not fleshy, 1-2 mm in diam.; lip ca. 3.5 mm.   1 C. tenuicaulis
+ Stems stout, clavate, fleshy, 2-6 mm in diam.; lip nearly 1 cm   (2)
2 (1) Lip yellow.   2 C. cristatus
+ Lip lateral lobes with purple edges, mid-lobe with lighter purple edges and patch.   3 C. marginatus

Lower Taxa


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