NEW OR NOTEWORTHY ORCHIDS 
slender, monophyllous. Leaves erect, narrowly elliptic or 
elliptic-oblong, tridenticulate at the tip, gradually narrowed 
downward into a slender sulcate petiole; lamina 5-7 cm. 
long, 7-10 mm. wide, coriaceous; petiole about 1.5 cm. long. 
Scape slender, ascending, together with the raceme 5-9 cm. 
long, with three to four closely oppressed tubular bracts. 
Raceme 2-5 cm. long, slender, the flowers opening in suc¬ 
cession. Bracts of the inflorescence about 3 mm. long, ob¬ 
liquely infundibuliform, shorter than the pedicellate ovary. 
Lateral sepals about 6 mm. long, united almost throughout 
their length, forming a subelliptical lamina which is strongly 
concave and is furnished above the middle,— on each mid¬ 
nerve,— with a blunt papilliform retrorse emergence; each 
sepal is strongly carinate exteriorly along the mid-nerve with 
a keel terminating in a prolonged rostriform appendage. 
Dorsal sepal 5 mm. long, oblong, obtuse, strongly concave 
below the middle; apical half thickened, convex, dorsally 
carinate, with the keel which is nearly 1 mm. deep becoming 
evanescent above the middle of the sepal. Petals 3 mm. 
long, about 1.25 mm. wide, semielliptical, 2-nerved, acute, 
shortly aristate beneath the tip. Labellum 3 mm. long, 
about 1 mm. wide, linguiform, obtuse, 3-nerved at the base, 
strongly bicarinate near the middle, the keels more or less 
crescentiform. Column about 3 mm. long, produced at base 
into a conspicuous foot, dilated above, tridentate at the tip 
with the apical margin obscurely denticulate. 
In habit and floral structure, Scaphosepalum Standleyi 
resembles S. Piitieri Schltr., but differs from it in the lateral 
sepals with differently situated papilliform emergences, and 
in the differently shaped aristate petals. [Fig. 4: 1, flower 
with the perianth segments spread out, showing the external 
rostrate appendages of the lateral sepals and the retrorse 
appendages on the inner surface X 4. 2, column X 7. 3, 
labellum X 6 4, petal X 6 %.] 
Costa Rica, Province of Cartago, Cerro de La Carpin- 
tera, Paul C. Standley 34477, February 1924. 1500-1850 
Rieters altitude. On tree; flowers dark red. (Type in Herb. 
Ames No. 29631.) 
