late, long-acuminate, concave below, forming a promi- 
nent mentum with the column-foot, about 1.3 cm. long 
and 2.8 mm. wide near the base. Petals narrowly cuneate- 
oblong, lightly oblique, rounded at the cucullate apex, 
3-nerved with the mid-nerve marked by a conspicuous 
thickening on the back about 5 mm. long and 1.6 mm. 
wide near the apex. Lip arcuate-recurved in natural po- 
sition, when expanded narrowly obovate-oblong in out- 
line, very lightly constricted on each side near the middle 
and thus subpandurate, gradually narrowed toward the 
base, broadly rounded at the apex, up to 5.9 mm. long 
and 2 mm. wide near the apex; disc with two short paral- 
lel keels near the middle. Column small, lightly arcuate, 
concave in front, about 3.9 mm. long at the back, 3-lobed 
at the apex with the lateral lobes acutely dentiform and 
the mid-lobe relatively large, retuse and coarsely dentate, 
produced at the base into a conspicuous upcurved foot. 
This species differs from the Bolivian Pleurothallis am- 
blyopetala Schltr. in having much longer stems and leaves 
and ecarinate pubescent sepals. It varies from the Ven- 
ezuelan P. meridana Reichb.f. in the form of the petals 
and lip. 
Junin: Prov. of Tarma, Agua Dulce, at 2000 meters altitude, on a 
tree in low highland forest, “‘Stalks slightly purplish. Leaf exceed- 
ingly thick and hard. Stem brownish at base,’’ March 8, 1948, F. 
Woytkowski 35432 (Tyre in Herb. Univ. Calif.; Isorypes in Herb. 
Ames and in Herb. Mo. Bot. Gard.). 
Liparis laticuneata C. Schweinfurth sp. nov. 
Herba mediocris, decumbens cum rhizomate longe re- 
penti, foliis raris ornata. Caulis superior foliosus. Folia 
petiolata; lamina ovata vel lanceolato-ovata, acuta vel 
acuminata, basi late cuneata vel subcordata; petiolus 
canaliculatus, basi tubulari caulem amplectenti. Race- 
mus subdense multiflorus. Flores pro genere parvi. Se- 
pala petalaque reflexa. Sepala similia, oblongo-lanceolata, 
[ 104 ] 
