TROPICAL AMERICAN ORCHIDS 
on the anterior face of the pedicel a prominent filamentous 
process 2 mm. long. Perianth segments spreading. Lateral 
sepals 1.5 cm. long, their basal half connate, 4.5 mm. wide 
near the base; free portion lanceolate, 6-nerved, acutish, 
tips cucullate on account of the involute apical margins. 
Dorsal sepal about 1.5 cm. long, 2 mm. wide near the base, 
narrowly lanceolate above, gradually extended into a fili¬ 
form channelled isthmus which is dilated into a fleshy tip, 
5-nerved near the lightly concave base. Petals about 1.1 
cm. long, narrowly linear, contracted into a filiform fleshy 
portion which is slightly dilated at the apex, 3-nerved (only 
the mid-nerve is prominent, as the lateral ones are very near 
the margins). Labellum narrowly lanceolate in outline, 
about 6.9 mm. long from the base of the short narrow claw 
to the porrect teeth at either side of the retuse apex; lamina, 
basal part suborbicular, with a small erect porrect falcate- 
triangular lobule and with two low thickened keels—-one on 
each side—which converge slightly; anterior portion ligulate, 
retuse, erose-dentate, 4-nerved, with a more or less distinct 
pair of parallel lines of papillae on the inner surface. Col¬ 
umn about 4 mm. long, slender, dilated above, and broad¬ 
ened below into a very short fleshy curved foot. 
Resirepia filamentosa is noteworthy for having the 
slender filament on the pedicel (observable in some species) 
unusually prominent. R. Powellii Schltr. is somewhat al¬ 
lied to this plant, but differs in the floral proportions. 
R. subserrata Schltr. is apparently another ally, but is a lower 
plant with larger, differently proportioned flowers. [Fig. 3: 
flower, side view X 2. 1, column and labellum, side view X 
3 ]/ 2 - 2, labellum, front view X 4. 3, dorsal sepal X 2 3^. 
4, column X 4. 5, petal X 3.] 
Panama, Province of Chiriqui, Gerro Horquita, C. W. 
Powell 344, October 1923. “Grows in shade on fallen trees 
and on logs. Flowers, ground color light yellow. Dorsal 
sepal has a red stripe down the centre for one half, apical 
yellow. Other sepals have red at base, with red stripe. 
Petals striped red. Column green with white cap.” (Type 
in Herb. Ames No. 27297.) 
