CENTRAL AMERICAN ORCHIDS 
The colors in Mr. Lankester’s field-notes are those 
given in Ridgway’s “ Color Standards and Color No¬ 
menclature.” 
The descriptions are from herbarium specimens. 
The arrangement of genera and species follows Pfitzer’s 
system proposed in Engler and Prantl’s “ Die natiirlichen 
Pflanzenfamilien.” 
Habenaria Lankesteri Ames sp. nov. Herba ter- 
restris. Caules prope basim foliosi. Bracteae supra folia 
vaginantes. Flores virides, in racemum subdensum dis- 
positi. Sepala lateralia deflexa, ovato-oblonga, concava. 
Sepalum dorsale erectum, late ovatum, valde concavum. 
Petala oblongo-triangularia, antice prope basim in dentem 
abbreviatum producta. Labellum tripartitum, divisionibus 
subaequalibus, lineari-oblongis. Calcar dependens, ovarium 
subaequans. 
Terrestrial herb 12-18 cm. tall. Leaves approximate, 
more or less basal, 4-5 cm. long, about 7 mm. wide, nar¬ 
rowly elliptic-oblong, tapering gradually toward both ends, 
acute, obliquely ascending, two of the leaves well developed, 
passing gradually into the acuminate bracts that sheath the 
upper part of the stem. Bracts of the stem two, alternate, 
closely oppressed, 1.5-2.3 cm. long. Raceme 3-4 cm. long, 
five or more flowered. Bracts of the raceme about 1 cm. 
long, closely oppressed to the ovary, lanceolate, acuminate. 
Pedicels very short, the ovary nearly sessile. Flowers green 
when alive, becoming brownish when dry. Lateral sepals 
slightly exceeding 4 mm. in length, about 2 mm. wide, 
pendent, ovate-oblong, strongly concave, fleshy, obtuse, 
somewhat thickened at the tip. Dorsal sepal 4 mm. long, 
elliptic-ovate, strongly concave, erect, the margin over¬ 
lapping the petals. Petals 3.5 mm. long, about 1.5 mm. 
wide, triangular-oblong, subacute, fleshy, with a short 
obliquely ascending tooth at the base on the anterior 
margin. Labellum fleshy, tripartite, the divisions subequal 
and linear-oblong, the laterals slightly shorter than the 
middle one, from base of labellum to tip of middle division 
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