ers very small, fleshy, distichous, maroon. Sepals very 
similar, round-ovate, broadly obtuse, connate below the 
middle, 3-nerved, glabrous without, densely minute- 
papillose within, up to about 8 mm. long (including the 
basal connate portion) and 2.8 mm. wide. Petals trans- 
verse, cuneate-flabellate, fleshy-thickened above with a 
subtruncate or broadly rounded apex, 1-nerved, about 
0.75 mm. long and 1.2 mm. wide. Lip ovate or oblong- 
ovate, broadly obtuse, fleshy-thickened with erect sides, 
semirhombic when viewed from the side, about 0.9 mm. 
long and somewhat narrower. Column abbreviated. 
This species is allied to Stelis latipetala Ames, but dif- 
fers in having shorter and more slender stems and leaves, 
and about twice larger flowers. 
Costa Rica: Prov. of Puntarenas, between Golfo Dulce and Rio 
Térraba, at 30 meters altitude, ““in tree top,’’ flowers maroon, De- 
cember 1947, Alexander F. Skutch 5336 (Tyre in U.S. Nat. Herb. 
1945424), 
Pleurothallis aurea Lindley in Ann. & Mag. Nat. 
Hist. 12 (1848) 397; Fol. Orch. Pleurothallis, p. 88, no. 
201 (1859). 
Pleurothallis asperilinguis Reichenbach filius & Wars- 
cewicz in Bonpl. 2 (1854) 114.—Lindley Fol. Orch. 
Pleurothallis, p. 84, no. 202 (1859). 
Humboldtia asperilinguis O. Kuntze Rev. Gen. Pl. 2 
(1891) 667. 
Humboldtia aurea O. Kuntze Rev. Gen. PI. 2 (1891) 
667. 
In the original description of Pleurothallis asperilin- 
guis, this concept was differentiated from P. aurea by 
having 8-nerved, instead of 1-nerved, petals and by hav- 
ing its flowers half as large as those of the latter species. 
However, an excellent photograph of the type of P. 
aurea from the Delessert Herbarium shows some petals 
which appear to be more or less distinctly 3-nerved, as 
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