LXx. COMPOSITA. 
Rays white; disk yellow. 5 18): 
Ray yellow, as well as the disk . . 20. 
Marginal flowers filiform, inl row. Leaves 
heath-like. . . . 25. 
Marginal flowers filiform, in ‘many rows. 
Leaves more or less broad. 
Anthers without tails . 
Anthers tailed at the base 
Pappus 0, or of very minute, flat scales. 
Receptacles flat. Disk-flowers 5- toothed, 
Shenley. 2s 
Receptacles conical. Disk- flowers 4- toothed 27. 
4, Heads diccious, discoid; male and female 
flowers in separate heads, on distinct roots. 
(Balsamic shrubs or trees.) 
Achenes woolly, without pappus . we 180! 
Achenes pubescent, with copious, bristle- 
shaped pappus . 5 BADE 
5. Heads monogamous, dissoid all the flowers 
tubular and perfect. 
Receptacles covered with rigid scales (palee) . 12. 
Receptacles nude. 
Anthers not tailed at base. 
Pappus bristle-shaped, uniform. 
Pappus es ep oy slender, deci- 
duous 
outer of ‘short, narrow 
Pappus double ; 
scales; imner of long, rough bristles . 22. 
Anthers tailed at base ; pappus copious, of 
many bristles, or of scales and bristles 
6. Heads compound, 7. e. many small, discoid heads 
united on a common receptacle, with a general 
involucre. 
26% 
. 32. 
. 23. 
Pappus in many rows, rigid, per sistent 24, 
. 35, 
eTOCs Bol 6 oo let 
161 
ERIGERON. 
NIDORELLA. 
LEPTOTHAMNUS. 
Conyza. 
BLUMEA. 
31. DENEKTA. 
DICHROCEPHALA. 
TARCHONANTHUS. 
BRACHYLENA. 
AMELLUS. 
CHRYSOCOMA. 
PTERONIA. 
FRESENIA. 
PEGOLETTIA. 
SPHHRANTHUS. 
TRIBE 4. SENECIONIDE®. (Gen. 39-124.) 
Subtribe 1. Henranruem. 
Receptacles bearing pales: among the disk-flowers. 
Leaves opposite, broad, mostly petioled. 
Anthers without tails, 
short, dark-coloured. Pappus of a few wey persistent awns or 0. (Gen. 
39-44.) 
Achenes beakless, without pappus. 
Receptacles flat. Involucral scales 2-seriate, 
ovate, acute edness ate A REPRE Cheb 
Receptacles flattish. Involucre double ; outer of 
5, spathulate, spreading, glandular leafy scales 40. 
Receptacles conical. Involueral scales short, 
appressed é . Ad, 
Achenes beaked, bearing 2 5, rigid, retrorsely his- 
pid bristles. . . 5, LBi goatee, ze 
Achenes beakless, with pappus. 
Pappus cup-shaped, toothed 2 . 41. 
Pappus of 8-10, rigid, unequal, rough bristles . 43. 
Subtribe 2. 
Hetente®. Leaves (except in Oedera) alternate. 
tacles nude or bearing pale. Anthers without tails. 
Ecurpra. 
SIEGESBECKTA. 
SPILANTHES. 
BIDENS. 
WEDELIA. 
LIPOTRICHE. 
Recep- 
Pappus of several 
M 
