suborbicular, erose on the lateral and forward margins; 
mid-lobe suborbicular to broadly flattened-triangular 
(more protuberant in the Lindley drawing), retuse with 
rounded lobules; disc bicallose at base, with three central 
parallel more or less evanescent fleshy lines. Column large 
for the flower, strongly dilated above, 4.5—5.6 mm. long. 
Vegetatively (aside from being taller) the Ostlund 
specimens agree in essential characters with the Hartweg 
plant. The flowers of the Hartweg specimen are approx|- 
mately the same size and appear similar in outline, but 
the lip, as drawn by Lindley, has a more protuberant 
mid-lobe and lacks the erose margins. The drawing, how- 
ever, seems to be rather sketchy. 
The floral parts of the Ostlund specimens appear to 
be suffused with purple, especially the petals, the column 
and the mid-lobe of the lip. 
Mexico, Rancho del Ojo de Agua, April. Hartweg s.n. (Uyrr in 
Herb. Kew. (Herb. Lindley)) : State of Guerrero, near Carrizal, south- 
west of Chilpancingo. On oaks. At 800 meters altitude. November 
12, 1982, flowered in greenhouse August 31, 1933. Erik M. Ostlund 
1659 (Collector Juan G.); near ‘‘Los Fresnos*’, southwest of Guay- 
améo, In mixed oak and pine forest on trees. At 2,400 meters altitude. 
October 5, 1933. Erik M. Ostlund 3103 (Collector O. Nagel). 
Epidendrum lancifolium Pavon apud Lindley, 
Gen. & Sp. Orch. Pl. (1881) 98. 
Epidendrum Langtassei Schlechter in Beihette Bot. 
Centralbl. 86, Abt. 2 (1918) 404, 
This species, based on a plant collected in Mexico 
by Pavon, has been a source of much perplexity. The 
original description is diagnostic, but not very full. The 
excellent plate in the Botanical Register (Bot. Reg. 28 
(1842) t. 50) is not sufficiently detailed to make certain 
that a distinct species and not a variety of 7. cochleatum 
L.. is represented. 
In 1918, Rudolf Schlechter described, under the 
[8] 
