TROPICAL AMERICAN ORCHIDS 
long, .8-.9 mm. wide, obtuse or subacute, very slightly 
broader above the middle, 1-nerved. Labellum ligulate and 
recurved in natural position, 3-lobed near the apex with the 
lateral lobes erect, when expanded lanceolate-obovate in out¬ 
line, about 2.8 mm. long (excluding the minute claw), 1.2 
mm. wide above the middle, 3-nerved; lateral lobes semi- 
cuneate with a rounded apex; middle lobe orbicular, re¬ 
curved. Column about 2.1 mm. long, arcuate, terminating 
in a petaloid 3-lobulate wing. 
The nearest allies of Pleurothallis segregatifolia are the 
West Indian P. elegantula Cogn. and P. trilobata Fawc. & 
Rendle, the former differing markedly in flower structure, 
the latter in vegetative and floral characters. 
The sepals and lip appear purple in the flower preserved 
in formalin. 
Costa Rica, La Fuente, Peralta, C. H. Lankester 914, 
June 24, 1924. “Flower hyaline & vinous purple.” On 
trunks of tree ferns. (Type in Herb. Ames No. 28691.) 
Pleurothallis spectabilis A. & S. sp. nov. Herba 
caespitosa. Radices numerosae, fibrosae. Caules abbreviati, 
monophylli. Folia oblanceolata, inferne sensim angustata, 
acuta. Inflorescentiae folia multo superantes. Pedunculus 
complanatus. Racemi densi, distichiflori. Flores magni. Se- 
pala lanceolata, intus dense papillosa. Petalaminuta.falcato- 
ligulata. Labellum bis deflexum, expansum ligulatum, late 
truncatum, bicarinatum. Gynostemium curvatum, late 
alatum. 
Rhizome abbreviated. Roots numerous, fibrous, some¬ 
what flexuous, glabrous, slender. Stems abbreviated, 1-2 
(usually about 1.5) cm. long, monophyllous, entirely con¬ 
cealed by loose tubular sheaths or the fibrous remains of 
sheaths, 1-jointed near or above the middle. Leaves cuneate- 
spatulate or oblanceolate, very gradually narrowed into the 
sulcate petiole; blade 6.35-10.3 cm. long, 1.15-1.6 cm. wide 
above the middle, acute, coriaceous, with five to seven more 
conspicuous nerves and the mid-nerve sulcate above and 
strongly carinate beneath. Peduncle up to the raceme 
15.3-21 cm. long, ancipitous, narrowly winged, with two or 
?y\ 
