45. COMPOSITE. 
195 
+++ Leaves alternate, eavline. 
(4.) 22. Sexecio. F1. of ray in 1 row, ligulate, fern., 
rarely 0 : of di.sk perfect, tubular. Inv. cylindrical or coni- 
cal, of 1 rotr of equal phyll. not membi anam at the margin, 
A^-ith or without smaller scales at its base. 
(5.) 21. DoEONicuM. Fl. of ray in 1 row, ligulate, fem. : of 
disk perfect, tubular. Inv. hemisphencal , of 2 or 3 ro^i s of 
equal phi/H. Pappus wanting in the ray. 
(6.) 8. LixosvRis. Heads not radiant. Fl. all perfect, tubu- 
lar (yellow). Eeceptacle naked, pitted ; pits with elevated 
dentate margins in our plants. Phyll. imbricate. Fr. 
compressed, silky, without a beak. 
(7.) 4. Aster. Z'/. o/ra// fem., ligulate, tH77ianyro?rs : of the 
disk perfect, tubular. Receptacle naked, pitted. Phyll. 
imbricate and a few scales on the peduncle. Pappus in 
many rows. Fr. compressed, without a beak. 
(8.) 5. Erigeeon. FI. of ray fem., ligulate, in 1 rote : 
of the disk mostly perfect, tubular. Receptacle naked. 
Phyll. imbricate. Pappus in many rows. Fr. compressed, 
without a beak. 
(9.) 7. SoLiDAGO. Pappus in 1 row. Fr. terete. (Fl. all 
yellow.) Otherwise like Aster. 
** Anthers with 2 bristles at their base. 
^ Receptacle trithout .scales. Fr. cylindrical or tetragonaJ. 
(10.) 9. IxULA. Fl. of ray fem., ligulate, rarely subtubular ; 
of disk perfect, tubular. Receptacle naked. Phyll. im- 
bricate in many rows. Pappus hair -like, uniform, in 1 rent . 
(11.) 10. PuiJCARiA. Phyll. laxly imbricate in a few rows. 
Pappus in 2 rows, outer short cuplike membranous toothed 
rarely wanting, inner hairlike. Otherwise like Inula. 
t+ Receptacle withmt scales or scaly only at the marain. Fr. 
cylindrical or compressed. Papjnis hairlike. 
(12.) 12. GNAPKAxrcJt. a7Z ^wiii/a/- ; outer fem. ; central 
perfect. Receptacle flat, not scaly. Inv. hemispherical, 
imbricate ; phyll. equalling the H. but not intermixed with 
them. — Cor. of the fem. ti. often inconspicuous. 
