Tas. 6648. 
CATASETUM cattosum. 
Native of Venezuela. 
Nat. Ord. OrcH1pDEa.—Tribe VanpDEx. 
Genus CataseTum, Swartz; (Benth. et Hook. f. Gen. Pl. vol. iii. p. 551, ined.) 
CatTasETuM callosum; pseudobulbis oblongis vaginatis, foliis obovato-oblanceolatis 
acutis plicatis, racemis multifloris, scapo rachi ovariisque rufo-brunneis, peri- 
anthii foliolis elongato-lanceolatis concavis acuminatis brunneis, sepalo dorsali 
petalisque erectis parallelis contiguis, sepalis lateralibus deflexis parallelis v. 
paullo divaricatis, labello hastato-ovato-v.-lanceolato luride virescente purpureo 
maculato obtuso convexo basi dorso saccato, apicem versus subtrilobo, lobo 
intermedio producto recurvo, marginibus crenulatis, callo basi virescente v. 
flavido, columna aurantiaca in rostrum elongatum gracile erectum producta. 
C. callosum, Lindl, in Bot. Reg. 1840; Mise. n. 183 and 1841, t. 5,f.1; Rchb.f. 
in Walp, Ann. vol. v. p. 568. 
A form of the Catasetum calloswm has been figured in 
this work (Plate 4219) under the name of var. grandiflorum ; 
it, however, differs from the original plant described by 
Lindley, and now pourtrayed here, more in colour and 
narrowness of leaf than in the size of the flower; for 
whereas in this the sepals and petals are of a rich brown, 
and the lip a uniform dull green speckled with red, in the 
var. grandiflorum the sepals and petals are pale dirty-yellow 
green, with red-brown tips, and the lip is of a bright 
verdigris green with purple edges and spots, a bright-red 
tip and red callus. There can, however, be no doubt as 
to the specific identity of these two plants. It would be 
more interesting to know whether this species presents 
the different sexual forms that some other species of the 
genus do, and upon which the genera Monachanthus and 
Myanthus were founded by Lindley, the former repre- 
senting a female form, having a short column without the 
cirrhi, a perfect stigma, and imperfect pollinia, and the 
latter a hermaphrodite form, with a ciliate lip and perfect 
SEPTEMBER lst, 1882. 
