Stenoptera ciliaris is allied to S. acuta Lindl., but 
differs from that species in having shorter broader leaves, 
pubescent ciliolate floral bracts and dissimilar lateral 
sepals. 
Ayacucuo: Aina, between Huanta and Rio Apurimac, at 750-1000 
meters altitude, in open woods, May 7, 17, 1929, E.P. Killip & A.C. 
Smith 22521 (Tyre in U.S. Nat. Herb. No. 1357470); clearing, Killip 
& Smith 22615 ; on open hillside, August 6, 1940, Killip & Smith 22692. 
—Cuzco: Machu Picchu, Urubamba, at 2000 meters altitude, on cliffs, 
C. Vargas 1889. 
Stenoptera laxiflora C. Schweinfurth sp. nov. 
Herba elata. Radices non visae. Caulis robustus, dense 
tomentosus, infra dense foliatus, supra vaginatus. Folia 
elliptico-lanceolata vel oblongo-lanceolata, in basim vag- 
inantem sensim angustata, infra conferta, supra in vaginas 
tubulatas redacta. Spica elongato-cylindrica, laxe multi- 
flora. Florum bracteae lanceolato-ovatae, dorso tomen- 
tosae, margine ciliatae. Flores parvi, extus tomentosi. 
Sepalum dorsale lanceolato-ellipticum, columnae adna- 
tum. Sepala lateralia parte basali in tubum longum con- 
nata; pars libera oblique oblongo-oblanceolata. Petala 
linearia. Labellum superum, tubulari-involutum cum 
apice patenti-reflexo, parte inferiore sepalorum tubo longe 
adnata, parte libera ex pansa spathulato-obovata. Columna 
longa, dorso sepalorum tubo longe adnata, supra retrorso- 
arcuata. 
Plant tall, stout, apparently up to 10.6 dm. high. Roots 
lacking in our specimen. Stem stout, densely tomentose, 
densely leafy below, many-sheathed above. Leaves ob- 
long-lanceolate to elliptic-lanceolate, acuminate, gradual- 
ly narrowed to asheathing base (the blades are imbricating 
on the lower part of the stem), up to about 21 cm. long 
(including the sheathing base) and 3.4 cm. wide, erect- 
spreading, gradually diminishing above into loose tubular 
sheaths (which are tomentulose below) and finally into 
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