or rounded-obovate, fleshy-thickened near the truncate 
or broadly rounded apex, up to 1 mm. long and 1.5 mm. 
wide at the apex. Lip similar to the petals but rather 
smaller, cuneate-subquadrate, nearly 1 mm. long and 
somewhat wider above, broadly rounded-truncate at the 
apex with a minute incurved apicule in the center, with 
the entire inner surface of the disc (except the margins) 
covered by afleshy thickening. Column of the genus, di- 
lated from the base, 3-lobed at the apex. 
Stels diffusa seems to be without close allies. The lip 
resembles that of S. Hndresi Reichb. f. 
Hvanuco: Huacachi, near Mufia, mountains, at about 2000 meters 
altitude, May 20—June 1, 1923, J. Francis Macbride 4148 (Typr in 
Herb. Field Mus. No. 535222; Dup.icare type in Herb. Ames No. 
59571); Yanano, at about 1850 meters altitude, on mossy tree, flowers 
greenish white with reddish center, May 13-16, 1923, Macbride 3845. 
Stelis grandibracteata C. Schweinfurth sp. nov. 
Herba mediocris, epiphytica, rhizomate repenti. Caules 
adscendentes, vaginis tubulatis evanidis omnino celati, 
apice monophylli. Folium breviter petiolatum; lamina 
elliptica vel oblongo-elliptica, apice obtuso minute triden- 
ticulata. Inflorescentia unica, folium conspicue super- 
ans, racemosa. Flores subdensi, parvi, numerosi, secundi, 
cum bracteis patentibus conspicuis. Sepala paene usque 
ad medium connata, trinervia, similia. Sepalum dorsale 
(pars libera) late ovatum. Sepala lateralia (partes liberae) 
rotundato-ovata. Petala minuta, rhombica, parte superi- 
ore multo incrassata. Labellum concavum, carnosum, 
ovatum, apice rotundatum, basi transverse carnoso-cari- 
natum. Columna generis. 
Plant medium-sized, epiphytic, ascending from a 
creeping rhizome, up to 19 cm. high. Roots numerous, 
fibrous, glabrous. Stems apparently approximate in pairs. 
Stems (when mature) about 6 cm. long, concealed by 
about three tubular evanescent sheaths of which the 
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