ORCHIDACEAE QUAEDAM AMERICANAE 
wide, ligulate, attenuated at each end, obtuse, coriaceous. 
Petiole 1-1.5 cm. long, sulcate above. Peduncles slender, 
arising singly or in pairs from a complanate sheath, with the 
raceme 10-12 cm. long. Sheath about 12 mm. long. Raceme 
up to 8 cm. long, flowers 2.5 mm. apart. Floral bracts 1.5 
mm. long, obliquely infundibuliform, acute, embracing the 
stem, shorter than the pedicellate ovary, brownish when 
dry. Pedicel with the ovary 2 mm. long. Flowers dis¬ 
tichous. Lateral sepals 2 mm. long, 2 mm. wide, broadly 
ovate, obtuse, 3-nerved, glandular-pubescent, margins mi¬ 
nutely ciliolate. Dorsal sepal similar. Petals hardly 1 mm. 
long, subrhomboidal from a wide base. Labellum 1 mm. 
long, about 1 mm. wide, very fleshy, broadly reniform from 
a short claw, rounded in front, concave, near the middle 
traversed by a thickened ridge, minutely papillose. Column 
fleshy, dilated toward the summit. 
Allied to Sielis conmixta Schltr. and S. perplexa Ames, 
having a very similar labellum. From the former it is readily 
distinguished by the dissimilar floral bracts, from the latter 
it is very different in having elongated secondary stems and 
distinctly ciliolate sepals. 
Guatemala, Department of Alta Verapaz, Chihob, 
Harry Johnson 939, October 23, 1920. Epiphyte. 3000 feet 
altitude. (Type in Herb. Ames No. 22089.) 
Stelis colombiana Ames sp. nov. Herba caespitosa, 
caulibus secundariis elongatis. Folium elliptico-oblongum. 
Racemus multiflorus. Sepala late ovata, trinervosa. Petala 
suborbicularia. Labellum crassum, usque ad medium in- 
crassato-callosum, infra apicem excavatum. Columna an- 
tice bilobata. 
Roots coarsely fibrous, white, smooth, about 1 dm. long. 
Secondary stems caespitose, about 1 dm. long, the upper half 
surrounded by a closely oppressed, tubular sheath, mono- 
phyllous. Leaf narrowly elliptic-oblong, obtuse, tapering 
from about the middle toward both ends, with the petiole 
6-11 cm. long, 1.5-1.8 cm. wide, coriaceous, midnerve 
prominent beneath. Petiole about 2 cm. long, sulcate above. 
Peduncles single or in pairs, emerging from a complanate 
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