BOTANICAL MUSEUM LEAFLETS 
HARVARD UNIVERSITY 
CampripGr, Massacuusetts, Fesruary 6, 1934 Voi. 2, No. § 
A NEW PLEUROTHALLIS 
FROM HONDURAS 
BY 
OAKES AMES 
AN ALTOGETHER remarkable species of the genus 
Pleurothallis from the Republic of Honduras isdescribed 
below. It is without close allies in Middle America and 
in the structure of the rostellum proves to be quite ex- 
ceptional. In the bud the lamina formed by the coherent 
lateral sepals closely enfolds the labellum, but at anthe- 
sis becomes markedly convex, the lateral margins becom- 
ing almost contiguous. ‘The labellum extends parallel to 
and in close contact with the convex sepaline lamina and 
is conspicuosly fringed with the segments of the fringe 
minutely glandulose. The column is characterized by an 
extraordinary development of the rostellum; this organ 
is deeply trifid with the elongated lateral segments linear- 
oblong, more or less porrect near the base and sharply 
deflexed beyond the middle. 
Pleurothallis oscitans Ames, sp. nov. Herba 
verisimiliter caespitosa. Caules secundarii elongati, gra- 
ciles, monophylli, prope basim paucivaginati, vaginis 
tubularibus arcte adpressis. Folium coriaceum, oblongo- 
lanceolatum, acuminatum. Pedunculi fasciculati, ex ax- 
illa folii orientes, plus minusve septemflori, verisimiliter 
penduli. Flores atropurpurei. Sepala lateralia in laminam 
valde convexam cohaerentia, extus valde carinata, mar- 
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