ovato-lanceolata, acuminata, reflexa, leviter obliqua. Se- 
palum dorsale unguiculatum; lamina late suborbiculari- 
ovalis, obtusa vel apice obscure emarginata, basi callo 
lamellato ornata. Androecium et gynoecium generis. 
Simple, erect, leafless, saprophytic, perennial herbs up 
to about 15 cm. tall. Stems slender, terete; bracts 5-14 
mm. long, scarious, lanceolate to ovate, acute to apicu- 
lute. Inflorescence 1-flowered: bracts like those of the 
stem. Flower erect, purple. Lateral sepals and petals 
similar or the petals slightly smaller, 5.5—7 mm. long and 
2-2.5 mm. broad, lanceolate to lanceolate-ovate, acumi- 
nate, reflexed, slightly oblique. Dorsal sepal unguicu- 
late; lamina about 10-12 mm. long and 9-10 mm. broad, 
suborbicular-oval, obtuse or slightly emarginate at the 
apex, with an upright lamellate callus at the base which 
extends back on the claw; claw about 4-5 mm. long, 
laterally compressed, fleshy. Stamens spreading; anthers 
subrotund, about 0.8 mm. long and 1.2 mm. broad; fil- 
aments about 1.5 mm. long. Styles connate, cylindric, 
obtuse. 
NeTHERLANDS New Gurnea: common saprophyte on leafy ground of 
oak forest, Bele River, 18 km. northeast of Lake Habbema, alt. 2300 
meters, plant tinged with purple, flowers purple, November 1938, 
Brass 11419 (Tyrer in Herb. Ames No, 43917). 
Corsia purpurata is easily distinguished from all other 
species of the genus by the broad lateral sepals, by the 
petals, and by the erect lamellate callus at the base of 
the dorsal sepal. The nearest ally seems to be Corsia 
crenata J. J. Sm. from which, however, it is easily dis- 
tinguished by the lateral sepals and petals as well as by 
the very differently shaped dorsal sepal. 
Corsia acuminata L. O. Williams sp. nov. 
Herbae erectae, efoliosae, saprophyticae, usque ad 20 
em. altae. Caules graciles; bracteae caulium oblongae 
vel lanceolatae, acutae vel apiculatae. Inflorescentia uni- 
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