Oncidium mimeticum var. flavidum (B.S. Wms.) 
Stacy, comb. nov. 
Basionym: Oncidium cucullatum var. flavidum B.S. 
Whis., Orch. Grow. Man. ed. 4, 229, 1871. 
Syn.: Oncidium cucullatum var. flavidum Linden, Cat- 
alogue under nos. 88 to 86, 1870. 
Oneidium olivaceum var. flavidum (B.S.Wmms. ) Sander. 
Orch. Guide 187, 1901. 
Neotype: Since no material is known to exist of the 
original introduction by Linden in 1870, Catalogue nos. 
33 and 36, the watercolors prepared by Day of the flow- 
ers sold under no. 38 and 86, and which are now kept at 
Ikew are regarded here as representing the holotype. 
Although this unusual color variant was noticed at first 
by Linden, the plant became officially described only by 
Williams in 1871. The color variant is maintained here 
distinct on account of its flowering time which is in De- 
cember. The flowering period of O. mimeticum is April— 
May. 
Illustration: Ill. Hortic. 25: t. 305, 1878, as Oncidium cucullatum. 
Oncidium azuayense Krzl. in Pflanzenr. Heft 80: 
3821, 1922. 
Type: Ecuador, southern slope of the Azuay moun- 
tains. Coll. Lehmann no. 587! (G). 
Observation: Dorsal sepal broadly elliptic, obtuse to truncate, oc- 
casionally somewhat retuse at mucronate apex, dorsally sparsely but 
distinetly papillose-muriculate, 9 mm. long, 5 mm. wide; lateral sepals 
connate, bilobulate in front, the inside margins of lobes often imbri- 
cate, dorsally prominently keeled and sparsely papillose-muriculate, 
especially near base, 10 mm. long, 8 mm. wide; petals broadly ellip- 
tic, rounded to deeply emarginate at the mucronate apex, dorsally 
with a few papillae near the base, 10 mm. long, 7 mm. wide; lip 
3-lobed, lateral lobes oblong to subquadrate, midlobe sessile, cordate- 
reniform, bilobed in front, 16 mm. long, 14 mm. across lateral lobes, 
24 mm. across terminal lobe; callus with a retrorse median tooth. 
The plants of this rather commonly occurring species in the Azuay 
region can easily be recognized by the dorsally papillose-muriculate 
[ 156 | 
