NEW OR NOTEWORTHY ORCHIDS 
panded portion scarcely 4 mm. long, 1.5 mm. wide, oblong- 
lanceolate, 1-nerved, the nerve prominent and subcarinate 
on the outer surface. Dorsal sepal similar to the laterals and 
equal to them, strongly concave. Petals long-caudate, about 
1 cm. long (including the caudate termination), expanded 
portion 2 mm. long, about 1 mm. wide, with about five un¬ 
equal fringe-like teeth on each side above the middle, con¬ 
spicuously 1-nerved. Labellum 2.2-2.5 mm. long, bilobulate 
near the base, with the lobules erect and rounded at the tip; 
upper two thirds of the lamina obovate, obtuse, with the 
margin glandular-ciliate, and the surface distinctly glandu- 
lose. Column too mature for studies of the structural 
details. 
Pleurothallis quinqueseta is closely allied to P. divexa 
Ames, from which it differs most conspicuously in the upper 
sepal being 1-nerved, in the petals being prolonged into cau¬ 
date tips, and in having a more membranaceous labellum. 
From P. setigera Lindl., a Peruvian species, which is another 
close ally, it differs in the structure of the labellum and 
apparently in having the caudate portion of each sepal 
longer in proportion to the expanded portion. 
The name quinqueseta is an allusion to the five tails of 
the perianth. [Fig. 6: 1, general habit about natural size. 
2, lateral sepal X 4 3^. 3, labellum spread out X 8.] 
Costa Rica, Province of San Jose, La Hondura, Paul 
C. Standley 36283, March 2-4, 1924. 1300-1700 meters alti¬ 
tude. On tree. (Type in Herb. Ames No. 29165.): S/anrffey 
38368, from the same locality, appears to be the same species. 
Pleurothallis Standleyi Ames sp. nov. Herba epiphy- 
tica, caespitosa. Caules secundarii monophylli, nervis muri- 
cato-hispidulis. Folium ellipticum, marginatum. Pedun- 
culi fasciculati, ex axilla folii orientes. Racemus pauciflorus. 
Ovarium glabrum. Flores extus glabri. Sepala lateralia 
usque ad medium cohaerentia, triangularia, margine minute 
ciliolato. Sepalum dorsale oblongo-lanceolatum. Petala 
oblongo-lanceolata, prope apicem lacerato-fimbrillata, uni- 
nervia. Labellum oblongum, margine breviter ciliolato. 
37 
