CENTRAL AMERICAN ORCHIDS 
4 mm. long; lateral divisions subparallel to the middle one, 
3 mm. long, hardly 1 mm. wide; middle division slightly 
exceeding 3 mm. in length, twice broader than the lateral 
divisions. Spur pendent, about 1 cm. long, slender. Stig- 
matic process prominent. 
Allied to Habenaria repens Nutt., but differs in the 
structure of the labellum and petals. 
Costa Rica, Jocosal, C. H. Lankester 342, December 16, 
1919. (Type in Herb. Kew.) 
Lankesterella Ames gen. nov. Sepalum dorsa.le 
erectum, liberum. Sepala lateralia cum columnae basi 
cohaerentia, mentum distinctum formantia. Petala angus- 
tata, libera. Labellum basi columnae affixum, exunguicu- 
latum; lamina erecta basi subsaccata e sepalis lateralibus 
tamen non protrudens, intus glabra, plus minusve pandurata. 
Columna brevis, prope medium valde curvata, transverse 
complanata in pedem semiliberum producta. Rostellum 
nonevolutum vel valde membranaceum. Anthera sagittata, 
erecta, longe stipitata, apicem columnae excedens. Pollinia 
pulvereo-granulosa. Capsula ovoidea. Herba epiphytica, 
glandulosa. Folia radicalia plura, vix petiolata, mem- 
branacea, caulina nulla. Flores mediocres in racemo laxo. 
Bracteae inflorescentiae membranaceae, magnae. 
Dorsal sepal erect, free from the petals, inserted just 
below the point of origin of the anther. Lateral sepals 
erect, hardly spreading, coherent at the base, united with the 
lower half of the column forming a distinct rounded mentum 
which includes and conceals the base of the labellum. 
Petals parallel to the dorsal sepal, inserted on the column, 
erect. Labellum affixed to the foot of the column, erect, 
sessile, strongly concave or subsaccate, continued upward 
into a panduriform lamina, provided below the middle on 
each side with a margined appendage. Column trans¬ 
versely flattened, curved sharply backward from about the 
middle, continued obliquely downward on the summit of 
the ovary into a distinct foot. Rostellum abbreviated. 
Anther inserted near the base of the erect portion of the 
column, stipitate, sagittate. Pollinia granulose. Capsule 
3 
