I 
■1 
I* 
N1':\V OH NOTKWOirrilY OHCIIIDS 
long, 2-nervecl, with the central nerve externally thickened, 
maroon-purple with the tails yellowish. Dorsal sepal 8 mm. 
long, lanceolate, tricarinate on the outer surface, produced 
at the apex into an elongated slender tail which is 4 mm. 
long, 3-nerved, with the nerves purplish. Petals 3 mm. long, 
about 1 mm. wide, with the margin conspicuously and ir¬ 
regularly fimbriate, — the segments of the fringe commonly 
bifurcate and purplish, — 1-nerved with the nerve thickened. 
Labellum about 2 mm. long, subsagittate, very obtuse, deep 
maroon-purple, densely and shortly glandulose above the 
middle with the margin glandular-fimbriate, strongly and 
deeply keeled beneath the base with the keel shortly fringed. 
Disc ecallose. Column fleshy. 
Allied to Pleurothallis hastaia Ames, but with the sepals 
long-caudate and the labellum quite different. 
Costa Rica, Peralta, C. II. Lankester 464, July 13, 1923. 
1200 feet altitude. (Type in Herb. Ames No. 27014.) 
J . Pleurothallis geminicaulina Ames sp. nov. Rhizoma 
, 1 ^ '■;|j elongatum. Caules secundarii inter se satis distantes, 
elongati, prope basim vaginati, monophylli. Folium valde 
coriaceum, oblongo-ellipticum, apice bidentatum, epetiola- 
tum, in sicco valde rugosum. Pedunculi fasciculati, pauci- 
llori, basi vaginati, folio multo breviores. Flores purpurei. 
Sepala lateralia paene usque ad apicem cohaerentia, laminam 
ellipticam formantia, extus bicarinata, dense glandulosa. 
Scpalum dorsale anguste oblongum, acutum, extus dense 
glandulosum. Petala lanceolata, acuta, margine bene fim- 
briata, nervo incrassato per medium. Labellum oblongum, 
earnosum, abrupte acutum, bicarinatum. Columna utrinque 
apice minute dentata. 
Rhizome rigid, elongated, about 4 mm. in diameter. 
Secondary stems 3-8 cm. long, 1-2 cm. apart, sometimes in 
pairs, when immature clothed with several tubular scarious 
sheaths, monophyllous. Leaf 5-6 cm. long, up to 2 cm. 
wide, oblong-elliptic, bidentate at the apex, conspicuously 
rugose when dry, thickly coriaceous, sessile. Peduncles 
! fasciculate, few, in the axils of the leaves, 2.5-3 cm. long, 
subtended by a spathaceous bract which is about 1 cm. long. 
.^)9 
