18 THE ORCHID REVIEW. [JANUARY, 1913. 
March 25th, 1902, under the name of Cycnoches Amesianum (Gard. Chron., 
1902, i. p. 218), but owing to the close resemblance to C. pentadactylon, 
especially in the shape of the very characteristic lip, we thought it a form 
of that species, and so recorded it (O.R., x. p. 117). The most obvious 
difference noticed was the rather smaller, more rounded spots, and the con- 
sequently greater amount of the yellow ground colour. This is less obvious 
in the flower now sent, and we think that both are forms of the same species. 
C. pentadactylon was described and figured by Lindley in 1843 (Bot. Reg., 
xxix., Misc., p. 18, t. 22), from a plant which flowered with Messrs. James 
Veitch & Sons, then of Exeter. It is a very striking species, but is seldom 
seen in such perfection as in the accompanying figure, which flowered with 
W. W. Mann, Esq., Ravenswood, Bexley, and received a First-class 
Certificate from the R.H.S. in January, 1893. It bore ten racemes—five of 
them on one pseudobulb—with an aggregate of 247 flowers, of which thirty- 
seven were borne ona single raceme. It isa remarkable specimen in every 
respect. The flowers shown are all males. The female flowers have been 
known since 1889, both sexes appearing together in the collection of E. 
Gotto, Esq., The Logs, Hampstead Heath. It is a native of the Upper 
Amazons, being found at Manaos, on the Rio Negro, and on its tributary the 
River Purus. The late Mr. E. S. Rand has stated that it is the giant of the 
River Purus, and without exception the most beautiful and fragrant 
Amazonian Orchid known to him, filling the air with a delicious Vanilla-like 
fragrance. He has seen the pseudobulbs three feet long and two inches in 
diameter, and bearing flowers of both sexes, the males in racemes from the 
top of the pseudobulbs, sometimes two feet long, with from fifty to seventy 
flowers, and the females beneath, with from one to three flowers. Occasion- 
ally both are found on the same inflorescence, of which an example is 
preserved at Kew. R.AR: 
—_->0<- 
ONCIDIUM HYBRIDUM.—Another plant of Oncidium hybridum (tigrinum X 
lamelligerum) was exhibited by Messrs. Charlesworth & Co. at the R.H.S. 
meeting held on November rgth last, this time in much improved form. 
It bore a branched inflorescence of twenty-two flowers and buds, the twining 
habit in this case being absent. A flower kindly given to us is 2} inches 
across, and has brown sepals with a narrow yellow margin, yellow undulate 
petals, prettily barred and blotched with brown, and a light yellow lip. 
The latter is three-lobed, with a broad front lobe 3 inch across, and the 
crest terminates in front in many yellow tubercles. The column wings are 
rounded, bilobed, and fleshy, and thus it will be seen that the influence of 
O. lamelligerum is very marked in the flower. The original plant received 
a Certificate of Appreciation from the R.H.S. on December atst, 1909, and 
was described in our pages (xviii. p. 8). 
