or less surpassing the leaves; branches short, diffusely 
forking, apparently up to 8-flowered. Flowers lax, mem- 
branaceous, parts of the perianth spreading. Lateral se- 
pals free, oblanceolate-spatulate, slightly asymmetric, 
minutely and obliquely retuse at the rounded apex with 
a dorsal subapical mucro, about 8.8 mm. long and 2.9 
mm. wide near the apex, I-nerved throughout and 3- 
nerved to above the middle, with the mid-nerve dorsally 
‘arinate to above the middle. Dorsal sepal very similar, 
about 8.3-8.8 mm. long and 3—-3.2 mm. wide above. Pet- 
als asymmetrically spatulate-oblong, minutely acute or 
slightly emarginate at the rounded apex,about 9-10 mm. 
long and 4—4.5 mm. wide near the apex, 8-nerved to above 
the middle with forking veins. Lip subquadrate-pandu- 
rate in outline, retuse and apiculate in front, truncate or 
slightly cordate at base, about 11.8-18 mm. in greatest 
length; basal part transversely oval, about 9.1—9.8 mm. 
broad, semiorbicular-dilated on each side; anterior part 
separated by an isthmus about 4 mm. wide, abruptly reni- 
form, about 10-11.5 mm. wide, consisting of two subor- 
bicular lobules. Dise of lip with a basal obovate shortly 
pubescent callus which is 8- to 5-dentate at the apex. 
Column short, stout, arcuate, about 4.2 mm. long (with- 
out the anther), provided below with a pair of porrect, 
fleshy semioblong or semielliptic pubescent cheeks and 
above with a pair of very short and broad subdolabriform 
wings which are irregularly lacerate or bilobed. Anther 
incumbent, obliquely conic, lying on the prominent tri- 
angular rostellar process. Pollinia two, complanate-sub- 
orbicular. 
Oncidium graciliforme appears to be closely allied to 
the polymorphic O. obryzatoides Kriinz]. Its claim to dis- 
tinctness lies chiefly in its relatively very slender habit 
and vegetative parts as well as in the transversely oval 
basal part of the lip. 
[97 | 
