ta, obtusa, disticha, valde conferta. Bracteae triangulares, 
obtusae, imbricatae. Sepalum dorsale elliptico-oblong- 
um, obtusum, trinervium. Sepala lateralia late obovata, 
obtusa, quinquenervia. Petala ovata, leviter acuta, tri- 
nervia. Labellum cruciforme; lobi laterales oblongi, cre- 
nati; lobus medius semiquadratus, crenatus; discus callo 
saccato, semicordato, pubescenti, apice furcato ornatus; 
sinu utrinque callus lanceolatus divergens stat. Columna 
generis. 
A small epiphytic herb. Roots fibrous, elongated. 
Stems slightly complanate, foliose, about 2 cm. long. 
Leaf-sheaths persistent, covering the stems. Leaves dis- 
tichous, oblong-oblanceolate, obtuse, somewhat crowded, 
coriaceous, rugose when dry, about 2—4 cm. long and 5-6 
mm. broad. Peduncle glabrous, slender, with one or two 
sterile bracts. Inflorescence densely flowered, 4-12 mm. 
long. Bracts of the inflorescence triangular, obtuse, im- 
bricated, about 1 mm. long. Dorsal sepal elliptic-oblong, 
obtuse, 3-nerved, about 8.5 mm. long and 2.5 mm. broad. 
Lateral sepals broadly ovate, obtuse, 5-nerved, about 4 
mm. long and 8 mm. broad. Petals ovate, somewhat 
acute, 8-nerved, about 8 mm. long and 2.5 mm. broad. 
Lip cruciform, about 3.5 mm. long and 6 mm. broad; 
lateral lobes of the lip oblong, crenulate, about 2.5 mm. 
long; mid-lobe of the lip subquadrate, crenulate, about 
1 mm. long; in the sac is a semicordate, saccate, pubes- 
cent, fureate callus: in each sinus is a divergent lanceolate 
eallus. Column characteristic of the genus. 
Thrivspermum fantasticum is allied to that group of 
species which contains 7’. Robinsonit Ames and 7\ quin- 
quelobum Ames, but is not closely allied to either of these 
species or to any of the other Philippine species. The cru- 
ciform lip, the very large saccate fureate median callus 
with glandular tips, the lanceolate calli in the sinuses, and 
the very broad perianth segments make this species an 
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