Observation: In many respects both the plants and flowers belong- 
ing to this new species resemble those of O. cucul/atum Lindl. It is 
unique in the whole alliance on account of the presence of distinct 
ears on each side of the stigma as well as the papillose lip. No doubt 
that many more undescribed species and forms are yet to be reported 
in this alliance. 
Oncidium cucullatum Lindl., Sert. Orch. sub. t. 21, 
1858. 
Type: Keuador: On the western declivity of Pichin- 
cha. Coll. : Jameson s.n./ (IX). 
Observation; The plants belonging to this species are rather small- 
flowered. Dorsal sepal 12 mm. long, 6 mm. wide; lateral sepals deeply 
concave, connate, bifid, 13 mm. long, 8 mm. wide; petals elliptic, 
obtuse, 12 mm. long, 8 mm. wide: lip 3-lobed, lateral lobes quad- 
rate, midlobe froma narrow isthmus reniform, deeply cordate, bilobed 
in front, 20 mm. long, 15 mm. across lateral lobes, 25 mm. across 
midlobe. The callus consists of three, keel-like, parallel ridges, the 
median ridge is triangular in lateral view, nose-like and longer than 
the lateral ridges which divaricate at front. 
The callus of the lip in the typical form as well as in the recognized 
varieties is always one-third of the length of the entire lip. Most 
probably because the type belonged to the Hooker Herbarium and 
because Lindley did not make a copy of it for himself, he confused 
it with O. sanguinolentum and with others now kept separate under 
O. olivaceum and O. mimeticum. 
Oncidium cucullatum is essentially Ecuadorian in distribution, but it 
may extend into Southern Colombia across the political boundary, up 
to Pasto in Depto. de Narino. 
Oncidium cucullatum var. dolabratum Stacy, 
var, NOV. 
Type: Ecuador, without proper locality. Coll. Jame- 
son s.n.! (IX). 
A var. cucullatum, floribus multo majoribus et lobis 
lateralibus labelli oblique triangulari-dolabriformibus 
differt. 
Dorsal sepal oblong-lanceolate, acute, 20 mm. long, 
6 mm. wide: lateral sepals connate, bifid, acute, 22 mm. 
long,7 mm. wide; petals ovate-lanceolate, acute, 19 mm. 
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