NEW OR NOTEWORTHY ORCHIDS 
This species was described from dried specimens to¬ 
gether with fresh flowers preserved in alcohol. 
Costa Rica, Province of Guanacaste, Quebrada Serena, 
Southeast of Tilaran, Paul C. Standley & Juvenal Valerio 
46304, January 27, 1926. About 700 meters altitude. “On 
tree; flowers red-orange.” (Type in Herb. Ames No. 31694); 
Standley & Valerio 46279: Province of Guanacaste, Los 
Ayotes, near Tilaran, Standley & Valerio 45445, Janu¬ 
ary 21, 1926. 600-700 meters altitude. “On tree; flowers 
orange-yellow”; Standley & Valerio 45471. “On tree; flow¬ 
ers deep orange”; Standley & Valerio 45504. “On tree; 
flowers orange-red.” 
Pleurothallis hirsuticaulis A. & S. sp. nov. Herba 
epiphytica, caespitosa. Caules graciles, vaginis arctis brun- 
neo-pubescentibus omnino obtecti. Folium singulum, ellip- 
tico-lineare, erectum. Flos singulus ut videtur, ex caulis 
summitate oriens. Sepala lateralia oblique ovata, in lam- 
mam suborbicularem profunde bidentatam connata. Sepalum 
dorsale ellipticum, concavum. Petala in circuitu falcato- 
lanceolata, e parte basali subquadrata in partem anteriorem 
ligulatam abrupte contracta. Labellum minutum, pandura- 
tum, bicallosum. 
Plant caespitose, 20 cm. or more tall. Roots fibrous, 
flexuous, glabrous, stout. Stems up to 21.5 cm. long, slen¬ 
der, erect-spreading from a decumbent base, monophyllous 
at the apex, entirely concealed by closely clasping tubular 
sheaths which are densely covered with spreading brown 
pubescence. Leaf linear-elliptic, 9-10 cm. long, 8 mm. wide 
la the middle, long acuminate with a minutely tridentate 
apex, gradually narrowed below to a cuneate sessile base, 
chartaceous in the dried specimen. Flower apparently sol¬ 
itary in the leaf-axil. Lateral sepals obliquely ovate, con- 
aate into a suborbicular lamina which is 7 mm. long to the 
base, 4-nerved, the sinus between the acute lobes about 3.7 
aim. long. Dorsal sepal elliptic, 8.8 mm. long, 5 mm. wide, 
ucute, concave, the marginal area thicker than the central 
portion, 5-nerved. Petals falcate-lanceolate in outline. 
29 
