lanceolate, navicular, acuminate, 10-10.2 mm. long, 
4,.2—4.5 mm. wide, carinate especially toward the apex, 
8-nerved. Petals elliptic-lanceolate, acute or shortly acu- 
minate, 6.2-6.5 mm. long and 2 mm. wide, slightly ob- 
lique, with a small tooth on each side near the base, not 
decurrent on the column, 5-nerved. Lip 6-6.4 mm. long, 
2.5-2.8 mm. wide above the middle, oblanceolate-oblong 
when viewed from the front, minutely denticulate at the 
broadly rounded apex, with the auriculate sides near the 
base slightly incurved, those just below the middle in- 
curved and separated by a large fleshy apically bilobed 
thickening and the anterior portion cymbiform; when 
viewed from the side, the margins embracing the fleshy 
thickening are semiorbicular-lobulate and denticulate to- 
ward the front. Column stout, slightly arcuate, about 
4.2 mm. long, terminating in a short denticulate wing, 
with the anterior surface flattened. Ovary densely muri- 
cate. 
Pleurothallis echinocarpa is apparently very similar to 
P. Otopetalum Schltr. (Otopetalum tunguraguae Lehm. 
& Kriinzl.) judging from the description, but I have not 
seen any examples of that concept. P. Otopetalum seems 
to differ specifically in having more than twice longer 
inflorescences as well as in characters of the lip. It is a 
more slender plant than P. gigantea Lindl. and lacks the 
spreading lateral lobes of the lip of that species. The 
fact that the petals are free from the column distinguishes 
this species from P. muricata Schltr. 
Huanuco: Mufia, at about 2100 meters altitude, ‘‘in dry wood. 
The 8 large parts reddish-green; inner yellowish-green,’’ May 23-— 
June 4, 1923, J. Francis Macbride 3969. (Tyrr in Herb. Field Mus. 
No. 535031; Durticare tyre in Herb. Ames No. 60979). 
Pieurothallis inaequisepala C. Schweinfurth sp. 
n0v. 
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