TROPICAL AMERICAN ORCHIDS 
abruptly rounded, minutely bilobed and mucronate at the 
apex (only two leaves terminating two branches are present). 
Flowers on slender 1-flowered peduncles which are thickly 
clustered in the upper leaf-axils. Peduncles 2.3 cm. or more 
long, entirely concealed by loose imbricating sheaths that 
are tubular below. Ovary slightly scabrous. Flower small. 
Sepals and petals slightly fleshy at the tip. Lateral sepals 
lanceolate, 5.9 mm. long, about 2.5 mm. wide near the base, 
acute, lightly oblique, somewhat concave at the base, 5- 
nerved. Dorsal sepal oblong-lanceolate, 5.9 mm. long, about 
2 mm. wide, concave, 5-nerved. Petals obovate-oblong, 
about 5 mm. long, 2.1 mm. wide, acute, often somewhat 
oblique, 4-nerved. Labellum continuous with the stout 
column-foot, shorter than the rest of the perianth, quad¬ 
rate in outline, porrect, 4-lobed when flattened out, about 
4 mm. long; lateral lobes erect in natural position, semi- 
orbicular, contracted above by a transverse fleshy callus ex¬ 
tending between the lobes; terminal portion conduplicate in 
natural position, suborbicular when expanded, about 2 mm. 
long and 2.6 mm. wide when spread out, sharply divided 
into two concave rounded lobules. Column very short and 
stout, 1.75 mm. long dorsally. 
Ornithidium conduplicatum has apparently no near al¬ 
lies, but tbe flower remotely recalls that of 0. fulgens 
Reichb. f. 
The leaf measurements were taken from the apical 
leaves on the branches, and, judging by the leaf-sheaths 
on the main stem, they are evidently much smaller than 
typical. [Fig. 5: flower and pedicel X 12. 1, column and 
labellum, in natural position x 4. 2, petal X about 4. 3, 
column X 7. 4, lateral sepal X 3 3^. 5, dorsal sepal X 
3 3^. 6, labellum, front view X 6.] 
Panama, Province of Ghiriqui, Palo Alto Hill, C. W. 
Powell 341, September-October 1923. 4000-5000 feet alti¬ 
tude. “ Grows in much sunlight. . . . The bulbs are bronze 
when they are mature.” (Type in Herb. Ames No. 28138.) 
Cryptocentrum gracillimum A. & S. sp. nov. Herba 
pusilla, caespitosa. Caules breves, vaginis foliorum omnino 
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