Allen 587 (Type in Herb. Ames No, 42015). 
Pleurothallis caudatisepala C. Schweinfurth sp. 
nov. 
Herba perparva, epiphytica. Caules dense caespitosi, 
brevissimi, vaginis tubularibus scariosis omnino velati. 
Folium spathulatum vel spathulato-oblanceolatum, in- 
ferne in petiolum sensim angustatum. Flores plures. 
Sepala similia, lanceolata, perlonge caudata, uninervia. 
Petala dimidio breviora, lanceolato-acuminata, leviter 
faleata. Labellum minutum, elliptico-ovatum, acutum, 
sessile. Columna brevissima, concavo-semiorbicularis. 
Plant very small, epiphytic, densely caespitose, reach- 
ing 3.5 cm. in height. Roots fibrous, flexuous, relatively 
stout. Stems very short, 1-jointed, up to about 5 mm. 
long, enclosed by two or three scarious tubular imbricat- 
ing sheaths. Leaf solitary, erect, spatulate or spatulate- 
oblanceolate, gradually narrowed to a petiole, up to 23 
mm. long including the petiole, up to 4.5 mm. wide, ob- 
tuse with a minutely bilobed and apiculate apex. Inflo- 
rescence exceeding the leaves, filiform, provided at base 
and below the middle with a scarious tubular sheath and 
at the top with two to six flowers in a loose or subum- 
bellate raceme. Floral bracts infundibuliform, sacumi- 
nate, scarious, much shorter than the pedicels. Flower 
(except the lip) membranaceous. Sepals lanceolate, very 
long-caudate, 1-nerved, apparently conduplicate. Dorsal 
sepal about 10.1 mm. long and 1.4 mm. wide near the 
base. Lateral sepals very similar, about 10.5 mm. long 
and 2mm. wide near the base. Petals similar to the sepals 
but much shorter, oblong-lanceolate, very long-acumi- 
nate, I-nerved, slightly faleate, about 5.2 mm. long and 
1 mm. wide. Lip much smaller, subfleshy, elliptic-ovate, 
sharply acute, 1.5mm. long, about 0.9 mm. wide, sessile. 
Column very short, concave, flabellate or semiorbicular, 
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