the two S. Sargentianum is by far the most beautiful, 
indeed it may prove to be the gem of the genus in point 
of coloration. It may be suggested that when the inter- 
mediate tracts of country between Guiana and Pernambuco 
are explored, intermediate forms will be found pak So, the 
supposed species would fall under the denomination of — 
geographical forms. As it is, the intervention of the vast 
low valley of the Amazons between their dwelling places 
appears to me to render such evidence improbable. 
S. Sargentianum was obtained in 1892 by the Royal Gar- 
dens from Messrs. F. Sander & Co. of St. Alban’s, who 
imported it, and with whom it flowered in a tropical orchid 
house in February, 1895. It is named in honour of Prof. — 
C. §. Sargent, Director of the Harvard Arboretum, Boston, 
U.S., and editor of “ Garden and Forest.” 
Deser.—Stem short, tufted, clothed with the equitan® 
bases of the distichous leaves, erect; root of stout fibres. — 
Leaves six to eight inches long by one and a half broad, 
oblong-lanceolate, acuminate, coriaceous, bright yellow 
with golden margins, deeply sulcate along the mesial line 
above, keeled beneath, nerves obscure. Scape six inches — 
high, as thick as a goose-quill, two- to three-flowered, — 
laxly hairy, as are the sheaths ; bracts pedicels and ovaries _ 
red brown, bracts on the scape and flowers one and a half — 
to two inches long, ovate-lanceolate, subacute, green, her-_ 
baceous. Flowers two to three at the top of the scape, — 
three and a half inches broad across the petals. Dursa! — 
sepal erect, oblong, acute, pale yellow, with five strong 
bright red dorsal ribs united by cross nervules; lateral 
united into an ovate subacute blade placed under — 
the lip. Petals much longer than the sepals, spreading — 
and rather deflexed, strap-shaped, subtwisted, undulate, 
ciliate, streaked with red, margins bright red. Lip an- 
inch and a half long, 
slipper-shaped, tip rounded, yellow _ 
with pale red veins, mouth oblong, sides deflexed in the 
mouth, lobes meeting by their margins, speckled with red, 
and with a minute white tubercle on the margin of each. 
Staminode broadly ovate, hairy, pale yellow.—J. D. H. 
Fig. 1, Side and 2, dorsal view of staminode:—Both enlarged. 
