ad 3.5 mm. longis, 1.2 mm. latis; labello oblongo-ligulato, 
antice rotundato vel subtruncato, erosulo, disco longitudinali- 
ter bicarinato, usque ad 5 mm. longo, 2 mm. lato; columna 
paululo arcuata, subclavata, usque ad 3.5 mm. longa; ovario 
cylindrico, usque ad 5 mm. longo. 
Epiphytic, caespitose plants, up to 5 cm. tall. Roots fascicu- 
late, flexuous, glabrous. Secondary stem approximate, very 
short, completely enclosed by two, loose-fitting, tubular 
sheaths, up to 4 mm. long. Leaves fleshy, linear-oblong, 
somewhat tapering toward the base, obtuse, up to 5 cm. long 
and 2 mm. wide. Inflorescence very slender, one-flowered, up 
to 2.5 cm. long. Bracts tubular, as long as the pedicels, up to 4 
mm. long. Flowers whitish. Sepals connate into a dorsally 
ventricose, arcuately curved tube, hence the name, up to 18 
mm. long, the free portions lanceolate-triangular, subacumi- 
nate, up to 8 mm. long and 3 mm. wide. Petals obliquely 
spathulate, rounded at apex, minutely mucronate, with an 
obscurely globose callus near the middle of the anterior mar- 
gin, up to 3.5 mm. long and 1.2 mm. wide. Lip oblong-ligulate, 
rounded to subtruncate in front with an erose margin; disc 
provided with a pair of elevated, longitudinal ridges, up to 5 
mm. long and 2 mm. wide. Column slightly arcuate, subcla- 
vate, up to 3.5 mm. long. Ovary cylindric, up to 5 mm. long. 
Venezuela: Estado Yaracuy; 7 km. N. of Salom, STEYER- 
MARK 106263! (AMES, VEN). 
Masdevallia pseudominuta, Sweet, sp. nov. 
Type: Venezuela; Curimagua, Sierra de San Luis, GARCIA 
s.n. sub DUNSTERVILLE 538! (AMES). 
Epiphytica, caespitosa, usque ad 3 cm. alta; radicibus fili- 
formibus, flexuosis, glabris; caulibus secundartis valde abbre- 
viatis, seu vix ullis, vaginis imbricantibus, tubulosis obtectis; 
foliis carnosis, lineari-oblanceolatis, usque ad 3 cm. longis, 2 
mm. latis; pedunculo gracili, unifloro, usque ad 2 cm. longo; 
bracteis tubulosis, usque ad 3.5 mm. longis; floribus luteis; 
sepalis tubulosis, dorsaliter ventricosis, arcuatis, 6mm. longis, 
lobis liberis, triangulari-lanceolatis, subacuminatis, usque ad 5 
mm. longis, | mm. latis; petalis oblique spathulatis, obtusis, 
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