flora. Sepala lateralia et petala lineari-lanceolata, acumi- 
nata, leviter obliqua, reflexa. Sepalum dorsale unguicula- 
tum; lamina transverse ovalis, callo lamellato proximato 
ornata; unguis gracilis, carnosus, compressus. Stamina 
et stigmata generis. 
Simple, erect, leafless, saprophytic, perennial herbs up 
to 20 cm. tall. Stems slender; bracts 10-15 mm. long, 
amplexicaul at the base, oblong or lanceolate, acute or 
apiculate, membranaceous. Inflorescence 1-flowered. 
Flowers erect, dull garnet-colored. Lateral sepals and 
petals 6-7 mm. long and 1.32—2 mm. broad, linear-lan- 
ceolate, acuminate, slightly oblique, 1-nerved, reflexed, 
similar except that the petal opposite the dorsal sepal is 
the smallest. Dorsal sepal unguiculate, 16-20 mm. long 
(including the claw) and about 20 mm. broad; lamina 
about 12 mm. long and 20 mm. broad, transversely oval, 
with a callus-thickening below the center and a small up- 
right lamellate callus about 1.5 mm. high near the junc- 
tion with the claw; claw 4-5 mm. long, slender, fleshy, 
laterally compressed. Stamens with the filaments about 
1.5mm. long. Styles about 2 mm. long, joined, cylindric. 
British New Guinea: in wet forest, Ogeramnang, Morobe District, 
alt. 6000 ft., flowers dull garnet, December 2, 1936, Clemens 4475 
(Type in Herb. Ames No. 53722). 
Corsia acuminata is most closely allied to C. unguicu- 
lata Schltr., from which it is distinguished by the very 
broad lamina and the differently shaped lateral sepals 
and petals. 
Aracunitis Philippi 
Arachnitis Philippi in Bot. Zeit. 22 (1864) 217, non 
Arachnites F. W. Schmidt (1793). Conserved name. 
Achratinis Kuntze in Post & Kuntze, Lexie. Gen. 
Phan. (1908) 4. 
' Arachnitis Phil. has been conserved by the Special 
Committee for Phanerogamae and Pteridophyta ap- 
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