center at the base. Column very small, dilated upward, 
characteristic of the genus. 
This species appears to lack any close allies. 
Cuzco: Prov. of Quispicanchis, Hda. Itio, Marcapata, at 2000 me- 
ters altitude, in sunny rocky places, flowers yellow-brown, January 
27, 1943, C. Vargas 3115 (Tver in Herb. Ames No. 65215). 
Stelis attenuata Lindley Fol. Orch. Stelis (1858) 
2, no. 7. 
Stelis Lindleyana Cogn. var. carnosior C. Schwein- 
furth in Bot. Mus. Leafl. Harvard Univ. 10 (1942) 
120. 
On restudying this group, it appears more advisable 
to consider the concept described as Stelis Lindleyana 
var. carnosior as a form of S. attenuata. The collection 
Killip & Smith 24753 has markedly longer leaves than 
S. attenuata; the incomplete racemes are shorter than in 
the type, and, like the collection Aillip & Smith 23150, 
which is also assigned to this species, has greenish instead 
of purple flowers. 
Stelis breviracema C. Schweinfurth sp. nov. 
Herba mediocris, epiphytica, subcaespitosa. Rhizoma 
breve ut videtur. Caules approximati, pergraciles, uni- 
foliati, vaginis arctissimis tubulatis tecti. Folium longe 
petiolatum; lamina anguste elliptica, acuta, infra cune- 
ata; petiolus gracilis. Racemi bini, quam folium brevi- 
ores, laxe pluri- vel multiflori. Flores parvi, glabri, mem- 
branacei. Sepala basi connata, ovata, trinervia; sepalum 
dorsale acutum; sepala lateralia rotundato-ovata, paulo 
breviora et latiora, obtusa vel subacuta. Petala multo 
minora, rhombica, apice valde carnosa, uninervia. Label- 
lum petalis subaequale, ovatum, apice obtusum vel ro- 
tundatum, basi cordatum; discus callo carnoso sulcato 
occupatus. Columna parva, supra dilatata. 
Plant medium-sized, epiphytic, subcaespitose, about 
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