Ornithidium sigmoideum appears to be most closely 
allied to O. Wrightu (Schitr.) C. Schweinf., but differs 
strikingly in the details of the lip and in the relatively 
elongate column. 
The specific name is in allusion to the lip. 
Costa Rica, Cerro Gallito. At 2000 meters altitude. December 
20, 1927. M.Valerio 72 (Tyre in Herb. Ames No. 33641): Province 
of San José, La Palma. Epiphyte on mossy tree trunk. At about 
1600 meters altitude. February 3, 1924. Paul C. Standley 33058, 
33065, 
Telipogon parvulus C. Schweinfurth sp. nov. 
Herba nana. Caulis vaginis foliorum distichorum om- 
nino tectus. Folia linearia vel lineari-oblonga, coriacea. 
Inflorescentiae axillares, laxe pauciflorae. Flores pro gen- 
ere parvi. Sepala anguste ovata, breviter acuminata, con- 
‘ava, nervo medio conspicuo. Petala multo mayjora, 
elliptico-ovata, acuta. Labellum perlate rhombico-ova- 
tum, latius quam longius, apice rotundato subacutum. 
Columna velutina, antice in callum compresso-ovatum 
extensa. 
Plant dwarf, about 7 cm. tall (stem incomplete at 
base). Roots fibrous, flexuous, glabrous, numerous. Stem 
short, entirely concealed by the imbricating leaf-sheaths. 
Leaves linear or linear-oblong, coriaceous in the dried 
specimen, rounded at the apex with an apiculate tip: 
blades up to about 15 mm. long and 2 mm. wide. Inflo- 
rescences axillary. Peduncles below the raceme up to 3.2 
cm. long, filiform, glabrous, with a single infundibuliform 
spreading sheath enclosing what appears to be an incipi- 
ent branchlet. Raceme loosely 5- to 7-flowered, suberect 
or arcuate; rachis more or less fractiflex. Floral bracts 
spreading, infundibuliform. Pedicellate ovary filiform, 
elongate, about 11 mm. long. Flower small for the ge- 
nus. Dorsal sepal very similar to the lateral sepals, but 
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