gins; mid-lobe ovate, acute, protuberant, very fleshy, 
about 3-3.5 mm. long and 2.5—2.9 mm. wide at the base ; 
dise with a pair of small fleshy conical calli at the base. 
Column straight, dilated above in front, retuse in the 
center at the summit, about 6.5-7 mm. long on the dor- 
sal surface, produced on each side into an obliquely 
semiorbicular-ovate lobe. 
This species apparently lacks any close allies. It may 
be related to Mpidendrum sarcodes Lindl., but differs in 
having the peduncle entirely concealed by the spathes, 
and in having acute sepals, ete. 
Peru: Hudnuco, Carpish, at 2800 meters altitude, on a tree in 
cloud forest, leaf not thick but very hard and stiff, tip of column 
white, September 1946, F. Woytkowski 37014 (Tyre in Herb. Ames 
No. 65451). 
Brassavola ovaliformis C. Schweinfurth sp. nov. 
Herba epiphytica, pro genere mediocris, deserticola. 
Rhizoma repens, nodulosum. Caules approximati, plus- 
minusve elongati, vaginis tubulatis imbricatis scariosis 
omnino obtecti. Folia subteretia, gracilia, elongata, in 
siccitate arcuata. Flores duo, grandes, in pedunculi apice 
approximati. Sepala petalaque late patentia, valde sim- 
ilia, lanceolato-linearia, sensim angustata, apice acuta. 
Labellum multo brevius, inferne leviter involutum, ex- 
pansum ovale-ovatum, acutum, ecarinatum, margine in- 
tegro. Columna perbrevis, apice trialata, cum alis later- 
alibus faleato-lanceolatis et recurvis. 
Plant epiphytic. Roots fibrous, covered with a stout 
glabrous velamen. Rhizome creeping, nodulose, consist- 
ing of the approximate swollen bases of the stems. Stems 
crowded, up to 12.7 cm. or more long (the longest one 
incomplete), several-jointed, entirely enveloped by long 
tubular scarious imbricating sheaths, gradually dilated 
upward, 1-leaved at the apex. Leaves very slender, sub- 
terete, channelled, arcuate in the dried specimen, about 
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