* 
Tas. 4219. 
CATASETUM ca.Luosum; var. GRANDIFLORUM. 
Tumour-lipped Catasetum ; large-flowered var. 
Nat. Ord. OncH1pE®.—GyNANDRIA MONANDRIA. 
Gen. Char. _Perianthium sepius globosum, nunc explanatum. Sepala et petala 
subzequalia. Labellum crassum, carnosum, nudum, ventricosum vel explanatum, 
fimbriatum ; sub apice saccatum obsolete trilobum. Columna erecta, aptera, 
libera, apice utrinque cirrhosa. 4nthera sub-bilocularis, antice truncata. Pollinia 
2 postice biloba vel sulcata; caudicula maxima nuda demum elastice contractili ; 
glandula cartilaginea subquadrata——Herbee terrestres vel epiphyte ; caulibus bre- 
vibus fusiformibus, vestigiis foliorum vestitis. Folia basi vaginantia, plicata. Scapi 
radicales. Flores speciosi, racemosi, virides, nunc purpureo-maculati. Lindl. 
Catasetum callosum ; petalis concoloribus lineari-lanceolatis sepalo dorsali con- 
formi suppositis, labello ovato-deltoideo acuminato margine reflexo basin 
versus solummodo saccato supra saccum callo magno conico instructo, 
column acuminate cirrhis vix ultra callum extensis. 
Catasntum callosum. Lindl. Bot. Reg. 1840. Mise. 183. et 1841. tab. 5. f. 1. 
B. grandiflorum ; floribus majoribus labello magis acuminato viridi-rubro punctis 
sanguineis irroratis, callo roseo. (TaB. NosTR. 4219.) 
This singular plant, of which the flowers may, I think, be 
likened to the body and legs of a great spider, is from the rich 
collection in Syon Gardens, and was received by His Grace the 
Duke of Northumberland from Columbia. Notwithstanding the 
large size of the blossoms, and the slightly dissimilar form and 
different colour of the lip, I fear it can only be considered a 
variety of C. callosum of Dr. Lindley, and I am the more confirmed 
in this opinion from afterwards receiving from Syon a smaller 
state of the same plant, exactly, as it were, intermediate between 
the two. Its long pendent spikes of dingy purple flowers, of 
which the floral coverings are singularly divaricated, the three 
upper pieces being applied to the back of the column, the two 
lower to the under-side of the lip, are produced in December. 
Descr. Pseudo-bulbs oblong, terete, sheathed with the large 
-membranaceous bases of the lower and smaller leaves. Large 
Zeaves a foot or more in length, terminal, lanceolate, membrana- 
ceous, striated. Scape from the base of the pseudo-bulb, in- 
cluding the flowers, a foot and more long, the base green, the 
Marca Ist, 1846. 2A 
