616 BENGAL PLANTS. (Cosmos. 
of hermaphrodite florets connate in regular tubular corollas, with 
cylindric, shortly 5-fid limb. Stamens seer ous; anthers 
with entire or minutely 2-toothed base. Style of hermaphrodite 
florets with slender arms thickened Cais hirsute, with short, 
a 2) ON Cypsela narrow, somewhat 5-gonous or dor- 
mpressed, more or less beaked ; pappus of 2-4 persistent, 
sly barbellate awns. 
OSMOS SULFUREUS Cav. 
Chota Nagpur; C. Bengal. 
A weed in waste places ; native of America. 
480. Bidens Linn. 
Annual or perennial, sometimes scandent herbs; leaves oppo- 
site, entire, lobed or 1-2-pinnatisect. Flower-heads small corym- 
Se, or medium subsolitary, heterogamous, rayed; ray- -florets 
1- -seriate, neuter, or > rarely female, fertile; disk-florets hermaphro- 
ite, 
involucre campanulate or subhemispheric ; bracts sub-2-seriate, 
often slightly connate below, outer short, herbaceous, or long and 
leafy, inner membranous; receptacle flat or convex ; pales narrow, 
nearly flat. Calyzx-limb 2-4-toothed. Petals of ray-florets con- 
nate in ligulate corollas, with a spreading, entire, or somewha 
toothed lamina; of hermaphrodite florets connate in regular 
tubular corollas, with a cylindric, short rtly 5-fid limb, Stamens 
Syngenesious; anthers with entire or bluntly sagittate base. 
Style of textiuliieesaes florets wi s hirsute upwards, W 
short acute, or long subulate appendages. Cypsela dorsally com- 
pressed or somewhat 4-gonous, linear or cuneiform, often nar- 
rowed but not — above ; pappus of 2-4 pendent retrorsely 
barbellate awn 
1097. Brows prtosa Linn.; F, B. I. iii, 809. B. bipinnata 
iii. 411, 
ar Nagpur; N. Benga 
An erect herb, with on barbed achenes. 
481. Glossogyne Cass. 
Perennial glabrous herbs, with almost —_ sa - — 
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