478 PROCEEDINGS OF THE AMERICAN ACADEMY 



greenish, spreading, lanceolate, concave, 2 lines long ; petals as long, 

 white dotted with orange, lanceolate, somewhat falcate, incurved : lip 

 white, ecallose, hastate with a shortly cuneate base, the short rounded 

 lobes and lower margin recurved, the upper margin somewhat in- 

 curved : column greenish. — Forests of eastern Guatemala; April, 

 1885. Described from specimens now in flower at Cambridge. 

 Clearly distinct from all species of Central America of which I fiud 

 record. 



Ornithocephalus Pottsi^. Leaves (about 12) fleshy, falcate, 

 acute, jointed at base, 1 to li inches long by 2 or 3 lines wide: ra- 

 ceme twice longer than the leaves, erect, shortly pedunculate, about 

 12-flowered, the rhachis somewhat triangular by the decurrent mid- 

 vein and lobes of the bracts ; bracts cordate, acute or the upper acut- 

 ish, clasping, the rounded recurved lobes minutely denticulate : ovary 

 twisted and flower inverted ; sepals rounded, deeply concave, greenish 

 white with a green excurrent midnerve ; petals twice longer (Ih lines), 

 white, cuneate-reniform, minutely denticulate above, the lower margins 

 recurved ; lip broadly lanceolate, constricted in the middle, the lower 

 portion thick, round-auricled, without lamellae, white at base and bright 

 green above, the upper portion abruptly reflexed against the sepals, 

 thin, greenish : column with a conical margined nectariferous pit at 

 the base of the lip ; beak white. — On trees near the Rio Dulce, 

 Guatemala ; described from specimens flowering in Cambridge, 

 August, 1886. In habit tlie plant resembles Oncidium iridifolium 

 very closely, which is frequent near Yzabal upon the branches of trees 

 overhanorinor streams. 



Bletia Pottsii. Terrestrial, the subglobose corm-like pseudo- 

 bulbs an inch or more in diameter : sterile stems 2-3-leaved, the 

 leaves thin, plicate, about a foot long by 6 to 12 lines broad: scape 

 2 or 3 feet high, simple, several-flowered, the closely sheathing dis- 

 tant bracts short (i inch or less) and blunt; floral bracts green, 

 lanceolate : sepals spreading, light rose-color, acute, the upper ob- 

 long, 9 lines long, the lateral broadly lanceolate and falcate, 6 lines 

 long; petals as long, erect, acutish, deeper colored; lip 6 lines long, 

 the broad lateral lobes greenish below and veined within with brown- 

 ish red, purplish and obliquely rounded above, the middle lobe re- 

 flexed and its sides recurved, undulate, emarginate, purple, 5-costate, 

 the three middle costae prominently crested and yellowish. — On dry 

 slopes bordering the Camino Real near El Mico, Guatemala; in 

 bloom April 27th, 1885 ; described from specimens flowering at Cam- 

 bridge. This and the preceding species are named in remembrance 



