584 BENGAL PLANTS. 
©Bracts of the involucre 1-seriate, subequal, free or united, 
with sometimes a few short outer bractlets (calycule) at their 
p. 
Leaves alternate; pappus of fine disiee usually soft and 
generally copious (SeNEctonrp%) ; style-arms of hermaphro- 
dite florets truncate or obtuse, penicillate or with a hairy 
ip :— 
Heads all homogamous; florets (in our species) all 
purp e 
Heads rayed, heterogamous; florets all yellow...Senecio. 
ee opposite; pappus paleaceous or absent (HEzE- 
IDEX in part); style-arms truncate, ese or not, 
or candies appendaged at tip; heads heterogamo 
appus absent; leaves entire or dentate; hee very 
small, ray som oti imes absent laveria. 
Pappus present, ag leaves cae heads 
arge; flowers s 
**Receptacle plenceons; : anthers subentire at the base 
opposite or alternate (HeiiantHoweE2) :—[p. 58: 
Anthers free or nearly so; female fe all apetalous ; 
heads 1-sexual, rarely heterogamous; male florets many i? 
globular heads; bracts of the involucre 1-seriate, ie 
female florets 2 together, united with the involucre es 
Xanthium 
prickly burr ; pappus 0; leaves all alternate .....- 
Anthers reunited i in a tube :— ! 
Heads 1- soshea? in globose clusters; bracts of the 1 
volucre ’ forming a 5-fid tube; lower or all the leaves opP® 
r : 
ois consisting of only 1-4 bristly awns, or up-like, 
t:—[p. 586] 
or absen 
Corollas of the fertile florets persistent on the achenes; 
pappus of 1-3 a ; leaves opposite ...-++++++ Zinnia. 
ttAchenes all oe or those of mie is rayon 3-cor- 
nered, and those of the disk laterally compresses 
pappus Renta or ne ert of 2-3 stiff, chaffy, 
bristly awns with or without intermediate sm# 
