specimens consisting of immature crowded buds). Floral 
bracts lanceolate, long-acuminate, scarious, the lower- 
most about 5.5 mm. long. Raceme loose, flowers 1 cm. 
or more distant. Dorsal sepal lanceolate-elliptic, 1 em. 
long, 4mm. wide, acute, 5-nerved. Lateral sepals asym- 
metrically elliptic-lanceolate, about 9 mm. long, 3.8 mm. 
wide, acute, 5-nerved. Petals asymmetrically | 
elliptic, about 9 mm. long, 4.5 mm. wide, 
narrowed to an obtuse or subacute apex, the 
margins of the upper half irregular, 3-nerved 
with the side nerves branching. Lip ovate 
in outline, 3-lobed near the apex, articulated 
to the short column-foot, 8 mm. long, 6.1 
mm. wide, broadly cuneate at base; lateral 
lobes semiovate, 6.2 mm. long, lobulate at 
their rounded apex; middle lobe much smaller, ee 
cular-quadrate, 2.1 mm. long and wide, shallowly retuse 
and apiculate, the margins strongly undulate and lobu- 
late; disc traversed by five parallel keels which are highest 
in the middle of the lip and become undulate near their 
apex; the three middle keels extend about to the middle 
of the mid-lobe, the lateral keels stop below the base of 
the mid-lobe. Column arcuate, 7.5 mm. long (measuring 
the posterior portion) ; clinandrium 3-lobed. Anther semi- 
globose, 2-celled, each cell 4-chambered. 
Mexico, Chiapas, Rio Leche. March 22, 1933. C. D, Mell 2084. 
(Tyrer in Herb. N.Y. Bot. Gard.) 
[7] 
