Cleisocentron Briihl. Guide Orch. Sikkim 136, 1926. 
Type: Saccolabium trichromum Rehb. f. 
Characterized by an erect, cylindric column with a 
more or less developed column-foot which is decurrent 
on the dorsal wall of the lip as a thickened cushion. 
Clinandrium shallow. Stigma oval, vertical. Rostellum 
distinct, porrect or arrect, bilobed with broad lobes. 
Pollinia 2, globose, each deeply split into unequal sizes 
on a single, linear stipe; gland large, subquadrate. Lip 
firmly adnate to column, urceolate, lobulate above. In- 
florescence axillary, many-flowered, racemose. 
Cleisocentron Collettianum (King & Pantl.) Garay, comb. nov. 
Basionym: Saccolabium Collettianum King & Pantl. in Journ. As. 
Soc. Bengal 66: 592, 1897. 
Cleisocentron Klossii (Ridl.) Garay, comb. nov. 
Basionym: S'accolabiam Klosstt Ridl. in Journ, Nat. Hist. Soc. Siam 
4: 120, 1921. 
Syn.: Cletsostoma langbianense Guillaum. in Bull. Mus. Hist. Nat. 
Paris, ser. 2, 31: 272, 1959. 
Cleisomeria Lindl. ex G. Don in Loud., Encycl. ed. 4, 
Suppl. 2: 1447, May 1855. 
Type: Cleisostoma lanatum Lindl. [tbid., p. 1472]. 
This genus has been completely overlooked by the 
compilers of Index Kewensis. Don gives the following 
generic description: ‘‘Sepals keeled. Lip didymous. 
Lateral lobes erect bifid, middle one concave bisetose at 
top. Caudicula cuneate, bifid, elongated.’’ This diagno- 
sis may be augmented by the nature of the inflorescence, 
1.e., the flowers, ovaries, bracts and rhachis are lanate to 
densely pubescent, a character unique in the whole al- 
liance. ‘The broad and deeply split, Y-shaped stipe is not 
known in this relationship; pollinia 2, globose, each un- 
equally split. Anther more or less reclined. 
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