obscure apiculatis, margine anteriore in medio obscure sub- 
globosa, usque ad 2 mm. longis, 0.8 mm. latis; labello lineari- 
oblongo, subtruncato, disco longitudinaliter bicarinato, carinis 
puberulentibus, usque ad 2.5 mm. longo, 0.8 mm. lato; colum- 
na abbreviata, clavata, usque ad 2 mm. longa; ovario cylindri- 
co, usque ad 2 mm. longo. 
Epiphytic, small, caespitose plants, up to 3 cm. tall. Roots 
filiform, flexuous, glabrous. Secondary stem short, completely 
enclosed by imbricating, tubular sheaths. Leaves fleshy, lin- 
ear-oblanceolate, up to 3. cm. long and 2 mm. wide. Peduncle 
slender, one-flowered, up to 2 cm. long. Bracts tubular, up to 
3.5mm. long. Flowers yellow. Sepals are united into a dorsally 
ventricose, somewhat arcuately curved tube 6 mm. in length, 
free portions spreading, triangular-lanceolate, subacuminate., 
up to5 mm. long and | mm. wide. Petals obliquely spathulate, 
obtuse, obscurely apiculate with an obscurely subglobose cal- 
lus near the middle of the anterior lobe, up to 2 mm. long and 
0.8 mm. wide. Lip linear-oblong, subtruncate in front with a 
pair of longitudinal, puberulent ridges, up to 2.5 mm. long and 
0.8 mm. wide. Column short, clavate, up to 2 mm. long. Ovary 
cylindric, up to 2 mm. long. 
Venezuela: Curimagua, Sierra de San Luis, GARCIA s.n. sub 
DUNSTERVILLE 538! (AMES). 
Masdevallia trioon Sweet, sp. nov. 
Type: Ecuador; Condor, FISKE s.n.! (AMES) 
Epiphytica, perpusilla, caespitosa, usque ad 4 cm. alta; 
radicibus filiformibus, flexuosis, glabris; caulibus secundariis 
vix ullis, vaginis tubulosis, 2, omnino obtectis, usque ad 2 mm. 
longis; foliis lineari-spathulatis, obtusis, basin versus angus- 
tatis, usque ad 4 cm. longis, 3 mm. latis; pedunculo filiform, 
unifloro, usque ad 1.5 cm. longo; bracteis tubulosis, usque ad 3 
mm. longis; floribus luteis; sepalis dorsaliter ventricosis, usque 
ad 6 mm. longis, lobis liberis patentibus, ovatis, obtusis, inde 
nomen, usque ad 2 mm. longis, 1.6 mm. latis; petalis e cuneata 
basi oblongo-ellipticis, acutis, margine anteriori callo globoso 
decora, usque ad 3 mm. longis, | mm. latis; labello e cuneato- 
subquadrata basi 3-lobo, lobis lateralibus falcato-triangulari- 
46 
