of 24 cm. and vary in width from 8 to 7 mm. The flow- 
ers seem to be invariably somewhat larger than those 
described. The sepals are about 5.5 mm. or less in length. 
The petals, which are only slightly shorter than the se- 
pals, are nearly always sharply acute or apiculate. The 
lip, which is about as long as the sepals, has a mid-lobe 
which is commonly semiorbicular to ovate and is always 
more or less sharply acute. The color of the flowers ranges 
from greenish or whitish to pale yellow often tinged with 
pink or pale lilac. The altitude of the habitat ranges from 
100 to 1800 meters. 
Orleanesia yauaperyensis Rodrigues in Vellosia 
ed, 2, pt. 1 (1891) 124—Cogniaux in Martius FI. Bras. 
3, pt. 5 (1898) 6, t. 3, fig. 1. 
There has recently come to hand a single Peruvian 
plant which seems to be referable to the above Brazilian 
species. It differs from the diagnosis of the type, how- 
ever, In having eight leaves, instead of four, the blades 
being somewhat larger (up to 13 cm. long and 2 em. 
wide) with an obtusely bilobulate, rather than obliquely 
acute, apex. The flowers also are slightly smaller than 
those of the type, the segments being about 6 (instead 
of 7-8) mm. long. Although no pollinia were figured nor 
described in the type citation of this species, those seen 
in the Peruvian plant were four in number, of which the 
inner pair were larger. This relationship appears to be 
exactly reversed in the characterization of Orleanesia (B. 
Rodr. Gen. et Sp. Orch. Nov. 1 (1877) 63) where the 
two outer pollinia are indicated as larger. 
Peru: Department of Loreto, vicinity of Iquitos, at 100 meters al- 
titude, on a dead tree, in a clearing, flowers mignonette and dark vio- 
let, November to December, 1936, G. Klug 10021. 
Polystachya cerea Lindley in Bot. Reg. 26 (1840) 
Misc. p. 86. 
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