ORCHID STUDIES, VIII 
BY 
Louis O. WILLIAMS 
THE PRESENT NUMBER of my Orchid Studies deals 
with a number of new species and an outstanding new 
genus of Philippine orchids. 
Ceratostylis caespitosa L.O. Williams sp. nov. 
Herba parva, epiphytica, caespitosa, usque ad 6 cm. 
alta. Pseudobulbi unifoliati. Folia elliptico-lanceolata vel 
oblanceolata, acuta, coriacea. Inflorescentia uni- vel for- 
sitan pauciflora. Sepalum dorsale lanceolatum, acutum, 
trinervium. Sepala lateralia lanceolata, acuta, columnae 
pedi adnata et mentum breve formantia. Petala lineari- 
lanceolata, acuta, uninervia. Labellum simplex, ovato- 
lanceolatum, acutum vel obtusum, unicallosum, breviter 
unguiculatum ; unguls bi- vel tricarinatus. Columna gen- 
eris. 
Small caespitose, epiphytic herbs up to 6 cm. tall. 
Stem pseudobulbous, unifoliate, up to about 1 cm. long, 
covered with imbricated sheaths. Leaf elliptic-lanceolate 
to oblanceolate, acute, coriaceous, 2.5-4 cm. long, 6-10 
mm. broad. Inflorescence one- or few-flowered, borne 
laterally in a cavity of the pseudobulb; peduncle 4-8 
mm. long, with a peltate bract at its junction with the 
pubescent ovary. Dorsal sepal lanceolate, acute, 3-nerved, 
about 8 mm. long and 1.5 mm. broad. Lateral sepals 
lanceolate, acute, 8- to 5-nerved, joined to the column- 
foot and with it forming a short mentum, about 4.5 mm. 
long and 2 mm. broad. Petals linear-lanceolate, acute, 
l-nerved, 2.5-8 mm. long and about 1 mm. broad. Lip 
simple, ovate-lanceolate, acute or obtuse, short-clawed, 
about 4mm. long and 2.5 mm. broad; claw with two or 
three carinate ridges; dise with a bipartite callus which 
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