species belonging to this section by the rather straight and erect 
growths with adpressed sheaths at the many nodes and by the 
triquetrous callus at the base of the lip. The dorsal sepal is 
obovate, obtuse, up to 8 mm. long and 5 mm. wide; the lateral 
sepals are shortly connate, spreading, ovate-oblong, up to 10 
mm. long and 4 mm. wide. The petals are ovate elliptic, obtuse 
or rounded, up to 12 mm. long and 7 mm. wide. The lip ts 
sessile, auriculate at the base with subrotund lobes, up to I1 
mm. across; the midlobe is transverse-reniform, emarginate at 
the apex, up to 2.6 cm. long and 3 cm. wide; the callus is small, 
triquetrous, with minute superficial processes along the mar- 
gins. The column is short with obliquely subquadrate auricles 
on either side of the stigma. 
DISTRIBUTION: Endemic in southern Ecuador. 
Oncidium Scansor Rchb.f. in Linnaea 22: 844, 1850. 
Type: Venezuela; Prov. Merida at 2000 m., Funck & Schlim 
1022! (W). 
Observation: O. Scansor is readily separated from O. 
globuliferum by the midlobe of lip being sessile; the lateral 
lobes are small and together form a somewhat saggitate base. 
The lip is up to 3.8 cm. long and 5 cm. wide, up to 15 mm. across 
the lateral lobes; the flat basal portion of the callus is pubes- 
cent. The dorsal sepal is elliptic-oblong, acute, up to 16 mm. 
long and 6 mm. wide; the lateral sepals are similar and slightly 
oblique, up to 17 mm. long and 5 mm. wide. The petals are 
obovate, up to 18 mm. long and 7 mm. wide. The column wings 
are subquadrate. 
DISTRIBUTION: Venezuela, Colombia. 
ILLUSTRATION: Dusnterville & Garay, Venez. Orch. Ill. 2: 
249, 1961 as O. globuliferum. 
Oncidium serpens Lindl., Gen. and Sp. Orch. Pl. 204, 1833. 
Type: Ecuador; Prov. Esmeraldas, Patacocha, at 1900 m., 
Hall 4! (K). 
Syn.: Oncidium trachycaulon Schltr. in Fedde, Rep. Beih. 
7: 191, 1920. 
59 
