150 
COMrOSIT-ZE. 
in the herm. heads. Receptacle naked. Involucre in one 
row. 
(3.) 3. Tussilago. Heads many-flowered, heterogamous. 
Fern, florets marginal, in many rows, narrowly ligulate. 
Male florets discoidal, tubular, 5-cleft. Receptacle naked. 
Involucre of one row of scales with membranous margins. 
(4.) 25. Senecio. Florets of the ray ligulate, fem., rarely 0 ; 
of the disk herm., tubular. Involucre cylindrical or conical 
of 1 row of equal scales not membranous at the margin, and 
several smaller scales at its base. Pappus pilose. 
(5.) 24. Cineraria. Involucre of 1 row of equal scales only. 
Otherwise like Senecio. 
(6.) 23. Doronicum. Florets of the ray ligulate, fem. ; of 
the disk herm., tubular. Involucre hemispherical of 2 or 3 
rows of equal scales. Pappus pilose, wanting in the ray. 
(7.) 8. Chrysocoma. Beads not radiant. Florets all herm., 
tubular. Receptacle naked, alveolate (alveoles with elevated 
dentate margins in our plant). Involucre imbricated. Pap- 
pus pilose. Fr. compressed, silky. 
(8.) 4. Aster. Heads radiant. Florets of the ray fem., ligu- 
late, in 1 row ; of the disk herm., tubular. Receptacle 
naked, alveolate. Involucre imbricated and a few scales on 
the peduncle. Pappus pilose, in many rows. Fr. com- 
pressed. 
(9.) 5. Erigeron. Heads radiant. Florets of the ray fem., 
ligulate, in many rows ; of the disk mostly herm., tubular. 
Receptacle naked, foveolate. Involucre imbricated. Pappus 
pilose, in many rows. Fr. compressed. 
(10.) 7- Solidago. Pappus pilose, in 1 row. Fr. terete. 
Otherwise like Aster. 
(11.) 9. Inula. Heads radiant. Florets of the ray fem., 
ligulate, rarely subtubular; of the disk herm., tubular. 
Anth. with 2 bristles at the base. Receptacle naked. In- 
volucre imbricated in many rows. Pappus pilose, uniform, 
in 1 row. 
(12.) 10. Pulicaria. Involucre laxly imbricated in few rows. 
Pappus in 2 rows, outer short cuplike membranous toothed, 
inner pilose. Otherwise like Inula. 
(13.) 21. Gnapiialium. Outer florets fem., central herm., 
all tubular. Pappus capillary. Receptacle flat, naked. In- 
volucre hemispherical, imbricated ; the scales equalling the 
florets but not intermixed with them.— Cor. of the fem. 
florets often obsolete. 
(14.) 20. Filago. Outer florets fem., filiform, in several 
