586 BENGAL PLANTS. 
ttAchenes more or less depressed from the top; 
oteien of 2, rarely 3-4, bristles, or absent :—{p. 584] 
Outer bracts of the involucre almost equal, her- 
baceous ; inner bracts separate, almost resembling 
the scales of the receptacle; ray-florets fertile; 
leaves opposite :— 
Achenes almost 4-cornered, without a pappus, 
but crowned by the densely pilose base of 
olla Guizotia. 
rrr flat, margins lacerate and winged; 
pappus present, composed of bristles 
Synedrella. 
Outer bracts of the involucre it small ; inner 
bracts connate below, membrano 
Style-arms a santeisialag or : coven by 
age 
a short appenda 
Leaves alternate, rflinnatinect; ray-florets fer- 
tile; achenes narrow, flat, long-ciliate, with 
2 stiff, endible ultimately eine awns 
Leaves opposite, simple to pinnatisect; Tay- 
florets sterile; achenes with 2-4 stiff awns, 
ultimately finely serrulate on inner side :— 
enes more or less beaked.....-.-- Cosm 
Achenes not beaked ......++:+s:+s-+s+0 Bidens. 
Style-arms ending in a ne shortly hairy 
oe ray-florets fertile 
Achenes long, crowned ear 9-3 stiff, per 
sistent atlas leaves mostly radical 
lo! 
Achenes without awns ; leaves mostly cn, 
ed 
scatter 
ttPappus of numerous scales; heads radiate ; a 
opposite :—[p. 584] 
Scales of pappus oblong, chaffy ; heads very small 
Galinsog4- 
Scales of pappus feathery, fringed ; heads medium 
‘|Anthers not appendaged at the apex; receptacle (in our species) 
pal 
not paleaceous ; > Pappus Sbaetit or F reduced toa raised : rim, rarely 
scaly and short; leaves [p. 582] 
> | meg ; 1 me ee eT + iL sie’ pap- 
a rae Sete ses i a ie ne nthemum 
es £ LE 4 ¢ " j 
