Material fragmentary, all parts separate. Pseudo- 
bulb pyriform, 2-leaved. Leaves linear-oblong, 16.2—-16.8 
cm. long, up to 1 em. wide. Inflorescence loosely pan- 
iculate, incomplete but about twice surpassing the leaves. 
Pedicellate ovary smooth. Flowers medium-sized. Lat- 
eral sepals elliptic-lanceolate, about 16 mm. long, 4.5—4.9 
mm. wide, acute. Dorsal sepal oblanceolate-oblong, about 
16 mm. long, 4.1—4.7 mm. wide, acute. Petals oblanceo- 
late-spatulate, 15-16.5 mm. long, 4.8-4.9 mm. wide, 
acute. Lip 13.2-14 mm. long from base of column to 
tip of mid-lobe; lateral lobes oblong-pandurate, asym- 
metric, porrect when expanded, about 7.8 mm. long on 
the interior margin, obliquely truncate or rounded at the 
apex; mid-lobe separated from the lateral lobes by a very 
short but distinct isthmus, suborbicular, 8.2—9 mm. long, 
9-9.5 mm. wide, slightly retuse to weakly trilobulate 
and apiculate at the apex, cuneate at the base; dise much 
as in the species except that the transition from the api- 
cally bidentate cushion-callus on the claw to the thick- 
ened veins is abrupt: veins minutely verruculose. Col- 
umn without auricles, 7—-7.9 mm. long dorsally. 
Variety perplexum seems intermediate between var. 
ramonense and var. Mooreanum. From the former it 
differs in the slightly longer sepals and petals, in the 
rounded or slightly retuse apex of the mid-lobe of the lip 
and in the longer and pandurate lateral lobes. It 1s sepa- 
rable from var. Mooreanum by the venation of the mid- 
lobe of the lip and by the pandurate not spatulate lateral 
lobes of the lip. In texture, the flowers are thinner than 
those of the allied varieties. However, the most striking 
character which separates this variety from all other 
forms of the alliance is the more prominent basal sul- 
‘ate callus and its abrupt transition to the veins. 
Mexrico, State of Vera Cruz, Zacuapan. On a tree. May 1907. 
C. 4. Purpus 7692 (Tyee in Herb. Univ. Calif. No. 198168.) 
[109 | 
