45. composite:. 
167 
Jussieu. It is more simple than that of DeCandolle, which is 
followed in the aiTangenient of the species; but in cases of 
difficulty they may both be used ^-ith advantage. 
Suborder I. CORYJIBIFERyE. 
Flowers of the disk tubular and perfect ; marginal flowers 
often hgulate and female or neuter. Style not swollen below 
its branches. 
A. Pappm more or less hairlike. 
• Anthers without bristles at their base. 
(1.) 1. ErPATOEH'M. Heads few-flowered. Phyll. imbri- 
cate, oblong. Receptacle naked. FL all fuh(lar-fmme\- 
shaped, perfect (reddish purple ). Anth. included. Branches 
of the style exserted, cylindrical, blimt. 
(2.) 2. Petasites. jHffffZs many-flowered. Fern. fl. filiform, 
obliquely tnmcate or shortly ligulate, in many rows in the 
fem. heads, none or in 1 row in the male heads. Male fl. 
tubular, few and central in the fem. heads, occupying the 
whole disk in the male heads. Receptacle naked. Phyll. 
in one row, — Pkmts st(bd{<ea'mis. Heads panicled. 
(3.) 3. Tttssilago. Heads many-flowered. Fl. of ray nar- 
rowly ligulate, fem., in many rows; of disk male, tubular, 
5-cleft. Receptacle naked. Phyll. in 1 row, with mem- 
branous margins,— Heads solitaiy. 
(4) 23. Sexecio. Fl. of ray in one row, ligidate, fem., 
rarely 0 ; of disk perfect, tubidar. Inv. cylindrical or coni- 
cal, of 1 row of equal phi/ll. not membranom at the margin, 
with or without smaller scales at its base. 
(5.) 22. DoRONici3i. Fl. of ray in 1 row, ligulate, fem. ; of 
disk perfect, tubular. Inv. hemispherical, of 2 or 3 rows of 
equal pih\jll. Pappus wanting in the ray. 
(6.) 8. LrxosYBis. Heads not radiant. Fl. all perfect, tubu- 
lar (yellow). Receptacle naked, pitted, pits with elevated 
dentate mai'gins in our plant. Phyll. imbricate. Fr. com- 
pressed, silkv", without a beak. 
(7.) 4, Aster. Fl. of ray fem., ligulate, in 1 ro^v; of the 
disk perfect, tubidar. Receptacle naked, pitted. Phyll. 
imbricate and a few scales on the pedimcle. Pappus in 
many rows. Fr. compressed, without a beak. 
(8.) 5. Ehigeeon. Fl. of ray fem., ligulate, in many rmcs ; 
of the disk mostly perfect, tubular. Receptacle naked. 
