plicate in the dried plant when seen from the side, about 
3.5-3.8 mm. long. 
This concept differs from the type in having somewhat 
smaller flowers, relatively broader lateral sepals and very 
dissimilar petals. 
Cuzco: Prov. of Convencién, Hda. Potrero, Sapan Sachayoce at 
2200 meters altitude, in humus of dense forest, March 5, 1942, C. 
Vargas 2558 (Tyrer in Herb. Ames No. 65623). 
Ponthieva bicornuta C. Schweinfurth sp. nov. 
Herba terrestris, pro genere major. Folia maxima pro 
parte basalia, rosulata, elliptica vel anguste obovata, 
acuta, basi in petiolum sulcatum sensim angustata. Pe- 
dunculus elatus. Racemus laxe multiflorus. Flores medi- 
ocres, albi et virides. Sepalum dorsale ellipticum, sub- 
acutum. Sepala lateralia majora, oblique oblongo-ovata, 
obtusa, margine anteriore late rotundato. Petala colum- 
nae adnata, oblongo-semihastata, obtusa, anguste un- 
guiculata. Labelli unguis a latere visus semiorbicularis, 
antice bicornutus, columnae adnatus; lamina erecta, 
concavo-conduplicata, expansa in circuitu ovato-sub- 
quadrata, apice trilobata, cum lobo terminali parvo, 
orbiculari-obovato. Columna crassa. 
Plant terrestrial, suberect, about 48 cm. or less high. 
Roots fibrous, lanuginose. Leaves three or four, mostly 
rosulate and subbasal; basal leaves three, elliptic to nar- 
rowly obovate, acute or short-acuminate, more or less 
gradually narrowed into sulcate basally imbricating peti- 
oles, about 18 cm. or less long including the petiole, 
1.2-3.2 em. wide; leaf above the basal cluster much 
smaller than the others, lanceolate-elliptic, acute, with 
a long sheathing base. Peduncle about 24—27.5 cm. long 
from the basal cluster of leaves up to the raceme, gla- 
brous below, glandular-pubescent above, provided with 
three to five close sheaths which are larger and tubular 
below and sessile near the inflorescence. Raceme loosely 
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