PN 
‘er 
Vir 
U 
BOTANICAL MUSEUM LEAFLETS 
HARVARD UNIVERSITY 
CamBripGe, Massacnusetts, JANUARY 28, 1941 VoL. 9, No. 3 
ORCHIDACEAE PERUVIANAE I 
BY 
CHARLES SCHWEINFURTH 
Tue following article is the first of a series resulting 
from a critical study of the orchids of Peru. The present 
paper treats seven species and one variety that appear to 
represent undescribed concepts. 
Habenaria avicula Schlechter var. peruviana C. 
Schweinfurth var. nov. 
Haec varietas herbae majore altitudine et caulis parte 
basali nuda longiore et labelli caleari longiore a planta 
typica differt. 
Plant up to 10.5 dm. tall. Stem leafy, but the basal 
portion (up to about 22 cm. long) provided only with 
sheaths. Leaves elliptic-lanceolate or lanceolate-ligulate 
(the upper and lower blades much smaller), acute or 
acuminate, clasping by a narrowed base. Raceme 22 cm. 
or more long, loosely many-flowered. Floral bracts ovate. 
Flowers greenish-white. Dorsal sepal deeply concave, 
rounded. Lateral sepals much larger, very obliquely sem- 
iorbicular. Petals small, divaricately bilobed with the 
posterior lobe linear-ligulate and the anterior lobe nar- 
rowly triangular. Lip 3-lobed with the lateral lobes re- 
duced to short spreading triangular or linear-triangular 
teeth, up to 11.5 mm. long. Spur considerably more 
than twice longer than the lip, up to 28.5 mm. long, 
narrowly clavate-cylindriec. 
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