160 45. COMPOSITE. 
tubular. Receptacle naked, pitted, pits with elevated den- 
tate margins in our plant. Phyll. imbricated. Pappus 
pilose. Fr. compressed, silky, without a beak. 
(8.) 4. Aster. Heads radiant. Florets of the ray fem., 
ligulate, in 1 row; of the disk perfect, tubular. Receptacle 
naked, pitted. Phyll. imbricated and a few scales on the 
peduncle. Pappus pilose, in many rows. Fr. compressed, 
without a beak. 
(9.) 5. Ertczron. Heads radiant. Florets of the ray fem., 
ligulate, in many rows ; of the disk mostly perfect, tubular. 
Receptacle naked. Phyll. imbricated. Pappus pilose, im 
many rows. Fr. compressed, without a beak. 
(10.) 7. Sorrpaco. Pappus pilose, in 1 row. Fr. terete. 
Otherwise like Aster. 
** Anthers with 2 bristles at their base. 
+ Receptacle without scales. Fr. cylindrical or tetragonal. 
(11.) 9. Inuna. Heads radiant. Florets of the ray fem., 
ligulate, rarely subtubular; of the disk perfect, tubular. 
Anth. with 2 bristles at the base. Receptacle naked. Phyll. 
imbricated in many rows. Pappus pilose, uniform, in 1 row. 
(12.) 10. Punicaria. Phyll. laxly imbricated in few rows. 
Pappus in 2 rows, outer short cuplike membranous toothed, 
inner pilose. Otherwise like Inula. 
tt Receptacle without scales or scaly only at the margin. Fr. 
cylindrical or compressed. 
(13.) 20. GnapHaLium. Outer florets fem., central perfect, 
all tubular. Pappus capillary. Receptacle flat, naked. In- 
volucre hemispherical, imbricated; phyll. equalling the 
florets but not intermixed with them.—Cor. of the fem. 
florets often obsolete. 
(14.) 19. Frnaco. Outer florets fem., filiform, in several 
rows, outermost ones intermixed with the inner scales of the 
involucre or pales; central florets few, perfect, tubular. 
Pappus capillary. Receptacle conical, scaly at the margin. 
Involucre subconical, imbricated, phyll. lanceolate longer 
than the florets. 
(15.) 21. AnTENNARIA. Heads subdicecious. Male florets 
tubular, style almost simple, pappus clavate. Fem. florets 
fihform, pappus capillary. Receptacle convex. Involucre 
hemispherical, imbricated, phyll. coloured at the end. 
