inis 2, alte amplectentibus omnino obtectis; foliis carnosis, 
lineari-oblanceolatis, acutis, basin versus sensim angustatis, 
usque ad 2 cm. longis, 2 mm. latis; inflorescentia capillari, 
uniflora, usque ad | cm. longa; floribus suberectis, parvis, 
luteis vel luteo-viridibus; bracteis tubulosis, usque ad 2 mm. 
longis; sepalis tubulosis, dorsaliter ventricosis, usque ad 5 mm. 
longis, lobis liberis, ovato-lanceolatis, acutis, usque ad 4.5 
mm. longis, | mm. latis; petalis inaequaliter dolabriformibus, 
apice truncatis, in medio prominenter apiculatis, lamina antice 
expansa, globoso-callosa, usque ad 2 mm. longis, 0.5 mm. latis; 
labello oblongo-ligulato, antice subtruncato, margine erosulo; 
disco lamellis triangulis ornato; toto labello usque ad 2.2 mm. 
longo, 0.8 mm. lato; columna abbreviata, clavata, usque ad 2 
mm. longa; ovario cylindrico, usque ad 2.5 mm. longo. 
Epiphytic, minute plants, up to 2.5 cm. tall. Roots fascicu- 
late, flexuous, glabrous. Secondary stem very short, com- 
pletely enclosed by two loose-fitting, scarious sheaths, up to 2 
mm. long. Leaves fleshy, linear-oblanceolate, acute, tapering 
toward the base, up to 2 cm. long and 2 mm. wide. Inflores- 
cence slender, one-flowered, up to | cm. long. Flowers sub- 
erect, small, greenish yellow to yellow. Bracts tubulose, up to 2 
mm. long. Sepals connate into a dorsally ventricose tube, 5 
mm. long, free portions Ovate-lanceolate, acute, up to 4.5 mm. 
long and | mm. wide. Petals unequally dolabriform, truncate 
with a prominent, median apicule, the anteriorly expanded 
blade witha globose callus, up to 2 mm. long and 0.5 mm. wide. 
Lip oblong-ligulate, subtruncate in front with an erose margin; 
disc with a pair of elevated triangular lamellae; whole lip up to 
2.2 mm. long and 0.8 mm. wide. Column short, clavate, up to 2 
mm. long. Ovary cylindric, up to 2.5 mm. long. 
Ecuador: Prov. Napo; vicinity of Papallacta, STACY s.n.! 
(AMES). 
Masdevallia irapana Sweet, sp. nov. 
Type: Venezuela; Sucre, Peninsula de Paria, N.E. of Irapa, 
STEYERMARK 95079! (AMES). 
Epiphytica, delicatula, caespitosa, usque ad 4 cm. alta; 
radicibus fasciculatis, filiformibus, glabris; caulibus secun- 
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