NEW OR NOTEWORTHY ORCHIDS 
up to 2.8 cm. wide, very obtuse at the apex, sessile with a 
cuneate or somewhat rounded base, erect, thickly coriaceous 
and rugose in the dried specimen, mid-nerve sulcate above 
and conspicuously carinate beneath. Inflorescences solitary 
or in pairs (very rarely a third rachis remains), much sur¬ 
passing the leaf; peduncle below the raceme commonly much 
shorter than the leaf, with 3-4 distant tubular sheaths; ra¬ 
ceme subdensely many-flowered; rachis fractiflex. Flowers 
small, all appear to be in a mature state, having well-de¬ 
veloped ellipsoid ovaries and connivent perianth segments. 
Sepals fleshy. Lateral sepals ovate, about 2.8 mm. long and 
1.8 mm. wide, subacute, l-nerved, conspicuously carinate 
on the outer surface. Dorsal sepal similar, broadly ovate, 
cucullate. Petals oblong-oblanceolate, about 2.1 mm. long, 
obtuse, l-nerved, membranaceous. Labellum simple, ob- 
ovate-pentagonal in outline with a truncate fleshy base and 
upcurved sides, 2 mm. long and about equally wide above 
the middle when spread out, obtuse, 3-nerved. Column 
small, stout. 
Pleurothallis simplex is apparently without Central 
American allies. It is vegetatively similar to the South 
American P. acuminata Lindl. and P. pulchella Lindl. 
The specific name is derived from the simple lip. 
Dried plants furnished the description. 
Costa Rica, Province of San Jose, Cerro de las Vueltas, 
Paul C. Standley & Juvenal Valerio 44023, December 29, 
1925-January 1, 1926. 2700-3000 meters altitude. “On 
tree.” (Type in Herb. Ames No. 33475); Standley & Valerio 
43652, 43664, 44011. 
Lepanthes acoridilabia A. & S. sp. nov. Ilerba pu- 
silla, caespitosa, epiphytica. Caules filiformes, monophylli, 
pluriarticulati, vaginarum ostiis hispidis. Folium ellipticum, 
breviter petiolatum. Inflorescentiae folium subaequantes. 
Racemus densus. Sepala lateralia lanceolata, obliqua, prope 
basim connata. Sepalum dorsale simile sed latius. Petala 
in circuitu sigmoidea. Labellum transverse oblongum, ob¬ 
scure trilobatum, Acoridium repetens. 
38 
