SYNOPSIS OF THE GENERA. 
Fruit compressed, the apex truncated. Pappus short, 
hairy, sessile. 
10. Barxnav'sta, [Page 1032.] Involucrum oval, with deci- 
duous awl-shaped scales, ribbed and furrowed when in 
fruit, the outer ones lax. Receptacle naked. Fruit 
striated, tapering into a slong slender beak. Pappus 
hairy, stalked. 
11. Cre'prs, [Page 1033.] Involucrum sub-imbricated, lax 
when in fruit, usually ribbed. Receptacle naked. Fruit 
roundish, or sub-compressed, numerously striated. 
Pappus hairy, soft, deciduous, sessile. 
12. Hrera'cium, [Page 1036.] Jnvolucrum imbricated. Re- 
ceptacle dotted, naked, or with a few short hairs. Sruit 
roundish, furrowed, striated, or sub-prismatical, with an 
entire or crenated marginal ring at the top. Pappus 
hairy, sessile, fragile, persistent, mostly of a dirty brown- 
ish white. 
Cicuort’um, [Page 1043.] Invo/ucrum of eight scales, united 
at the base, and surrounded by five smaller outer ones. 
Receptacle naked, or slightly hairy. Fruié striated. 
Pappus scaly, sessile, shorter than the fruit. 
& 
** Pappus none. 
14. Larsa'na, [Page 1044.| Jzvoluerum of numerous linear 
lanceolate scales, and small scattered ones at the base, 
erect, and unchanged in fruit. Receptacle naked. 
Fruit compressed, striated, deciduous. Pappus none. 
15. Arno'sEris, [Page 1045.] Jnvolucrum of numerous linear 
lanceolate scales, and small scattered ones at the base, 
converging into a globose head when in fruit. Fecep- 
tacle naked. Fruit obovate, pentagonal, furrowed, de- 
ciduous. Pappus none. 
2. Florets all with tubular corollas, and generally spreading, 
so as to form a hemispherical head. Style jointed 
towards the apex. 
A. Receptacle excavated, like a honey-comb. 
16. Onovor'pum, [Page 1046.| Jnvolucrum tumid, imbri- 
cated, the scales spreading, and spinous. Receptacle 
excavated, like a honey-comb. /’rui¢ compressed, four 
angled, and transversely furrowed. Pappus hairy, 
rough, united into a ring at the base, deciduous. 
