414 
47. COMPOSITACEJE. 
Tribe III. ERIGERONTEJE. 
Heads heterogamous rarely homogamous ; fl. of disk (or rarely 
all the fl.) perfect tubular regular, of margin ligulate or filiform 
and obliquely truncate. Branches of style linear compressed, 
rounded and pubescent but simple at the tip. Ach. compressed 
rarely cylindric, mostly without ribs. Pappus pilose. — L. alter- 
nate. Fl. rayed or rayless. 
+3. Erigeron. Heads heterogamous many-fld. hemisphe- 
rical : scales imbricate in several rows, herbaceous. Fl. of 
margin female in several rows, all ligulate or with only the 
inner tubular-filiform ; of disk perfect or male only, all tu- 
bular 5-fid. Ach. linear-oblong compressed ribless. Pap- 
pus uniform pilose, rough or scabrous, in a single row. Re- 
cept. naked alveolate. — Mostly herbaceous. Fl. rayed (in 
Mad. sp. inconspicuously or minutely). 
f4. Conyza. Like Erigeron but fl. of margin not ligulate 
but filiform truncate or 2-3-toothed, of disk few perfect 
tubular 5-toothed, ach. linear attenuate at base, and re- 
cept. Jimbrilliferous. — Herbaceous. Fl. wholly rayless. 
5. Gnaphalon *. Heads heterogamous many-fld. ovoidal or 
campanulate ; scales imbricate in many rows scarious. Fl. 
of margin female (fertile or barren) in several rows, fili- 
form, of disk perfect tubular 5-toothed. Ach. cylindric 
rounded at top ribless. Pappus as in Erigeron. Recept. 
naked flat. — Small shr. with cottony- w r . st. and 1. Fl. 
rayless. 
Tribe IV. SENECIONE.E. 
Heads heterogamous mostly radiate, rarely liomognmous dis- 
coidal ; fl. of margin mostly female and more or less conspicu- 
ously ligulate ; of disk (or rarely all) perfect tubular regular. 
Branches of style (in perfect fl.) linear with a pencil or tuft of 
hairs below the truncate or produced conoidal tip. Ach. cy- 
lindric ribbed. Pappus pilose. — Fl. mostly radiant y. 
0. Senecio. Heads cylindric or campauulate; scales in a 
single row equal mostly linear combined or concrete and 
mostly calyculate with several short accessory scales at 
the base. Fl. of margin mostly female and ligulate ; all 
sometimes perfect and tubular. Stigmas of perfect H. semi- 
cylindric truncate hairy only at the tip. Ach. all with 
softly pilose pappus in several rows. — Fl. mostly conspi- 
cuously radiant, rarely rayless. Ray mostly y., sometimes 
purple, rarely w. 
* Misspelled by Cassini and others Phagnalon. 
