NEW OR NOTEWORTHY ORCHIDS 
bulbs, two to three inches long, with a single oblong leaf, 
some three inches long by about one broad. The slender 
spikes are about half as long as the pseudobulbs, and are 
borne on a small lateral growth, as in Cattleya Walkeriana, 
which afterwards develops into a pseudobulb. The spikes 
are protected by one or two short basal sheaths, and the 
flowers are light green, and over an inch across, the lip being 
uppermost, three-lobed, and its stalk completely confluent 
with the column. The lateral sepals are slightly concave, 
and broader than the odd one, while the petals are narrowly 
linear-lanceolate. It is a very distinct and very interesting 
little plant.” 
Among specimens sent to me from Costa Rica by C. H. 
Lankester I have found excellent material of an Epidendrum 
which is clearly referable to E. laterale Rolfe. It has the 
large flowers of the type. I have compared this specimen 
with authentic material of E. Rousseauae, and have arrived 
at the conclusion that two distinct species are represented. 
It would seem that the difference in size between the flowers 
is simply a conspicuous manifestation of other differences. 
Epidendrum Rousseauae from the tip of the upper sepal to 
the tip of the labellum is about 1.9 cm. long. Measured 
similarly the flowers of E. laterale are 3-3.5 cm. long. Rolfe 
described the flowers of E. laterale as over one inch across. 
E. Rousseauae is slightly more than one-half inch across 
when the lateral sepals are spread out, while E. laterale, as 
represented by Lankester’s specimen, is from one to one and 
one-eighth inches across. In the middle lobe of the labellum 
there is a conspicuous difference between the two species, 
this lobe in E. laterale being dilated upward from a cuneate 
base, while in E. Rousseauae it is only slightly dilated from an 
oblong base. 
Costa Rica, Las Concavas, C. H. Lankester & Alfredo 
Sancho 372, December 1922. Flowers pale viridine-yellow; 
Lankester 54, December 2, 1918. Flowers and bracts mar- 
tius-yellow (Ridgway). Rachis green. Pseudobulbs terete, 
monophyllous. Inflorescence radical, pendent. (Type in 
Herb. Kew., Lankester 192.) 
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