nervia, 7-13 cm. longa, usque ad 3.8 cm. lata; petiolus 
canaliculatus, satis gracilis, circiter 5-10 em. longus. 
Caulis glanduloso-pilosus, usque ad inflorescentiam cir- 
citer 59.6—-71.4 em. altus, vaginis pluribus remotis orna- 
tus. Racemus laxe multiflorus, cum rhachide circiter 
10-16 cm. alta. Flores parvi, viridi-albidi. Sepala extus 
sparse glanduloso-pilosa, Sepalum dorsale elliptico-lan- 
ceolatum, ad apicem subacutum angustatum, trinervium, 
6-7 mm. longum, circiter 2 mm. latum. Sepala lateralia 
oblique ovata, subacuta, 6-7 mm. longa, circiter 3.1-3.4 
mm. lata, quinquenervia. Petala unguiculata; lamina 
obliquissime triangularis, acuta, basi semicordata, circiter 
4.7 mm. longa et 3 mm. lata; unguis oblongo-linearis, 
carnosus, circiter 1.8 mm. longus. Labellum columnae 
parti superiori adnatum, valde inflexum, cum lateribus 
involutis, expansum in circuitu ovatum, circiter 4 mm. 
longum et inferne 2.3 mm. latum, parte anteriore ob- 
longo-lineari et parte posteriore suborbiculari; discus basi 
cum callo rotundato-hippocrepiformi. Columna perbrev- 
is, crassa, supra abrupte dilatata, circiter 2.5 mm. alta. 
This species is vegetatively similar to Ponthieva dip- 
tera Linden & Reichb.f., but the petals and lip are very 
different. The lip somewhat recalls that of P. ecuadoren- 
sis Schltr. 
Amazonas: Cerro de la Neblina, Rio Yatua, 700 meters altitude, 
occasional in Clusia scrub forest just south of Camp 8, December 31, 
1957, Bassett Maguire, John J. Wurdack and Celia K. Maguire 42559 
(Tyre in Herb. Ames No. 69529). Borivar: Cerro Venamo, north- 
west slopes, 1100 meters altitude, terrestrial in moist mossy forest, 
leaves firmly membranaceous, deep green above, dull gray green be- 
neath, pedicels recurved, nodding, pale green, ovary ivory-white, 
April 21, 1960, Julian A. Steyermark & S. Nilsson 431. 
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