ORDER 70.—ASTERWORTS. 229 
8 ©. latifo’lia. Stem 4-Gf. high. Rays entire. Leaves ovate, serrate. S. 
9 C auricula’ta. Stem 1-3f. high. Rays 2-5-toothed. Lvs. often eared at base. 8. 
10 OC. lanceola’ta. Stem 2-3f. high. Rays 4-5-toothed. Lvs. lanceolate, entire. 8. 
11 ©. senifo’lia. Leaf divisions all entire, appearing in 6-leaved whorls. S. 
12 ©, verticilla’ta. Leaf divisions all again divided into narrow-linear lobes. W. 
18 C. palma’ta, Lvs. deeply 3-cleft, wedge-shaped, lobes linear, not whorled. W. 
14 ©. delphinifo’lia. Leaves sessile, 8-parted, the divisions often lobed. 8. 
15 C. gladia’ta. Sword-lv. C. Leaves petioled, lance- 
olate, sometimes divided. Stem round. §. 
16 C. angustifolia. Narrow-lw. C. Leaves petioled, 
narrow-spatulate, entire. Stem square. S, 
17 C, Gim’leri. Ginler’s C. Leaves petioled, lance- 
ovate, entire. Stem round below. 8. 
18 OC, Drummon/dii. Drummond's C. Lvs. pin- 
nately 8-5-foliate, divisions oblong-oval, 
entire. + 
19 ©. tincto’ria. Dyer’s C. Leaves pinnately 
much divided, divisions linear, entire. t+ 
20 C. ro’sea. Rose C. Stem leafy, leaves narrow- 
linear, entire. Rays rose-white. E. 
21 C.nuda’ta. Leajless C. Stem few-leaved, leaves 
awl-shaped, entire. Rays rose-red. S. 
5. ASTER. Starwort. 
Heads many-flowered. Scales of the invo- 
lucre generally imbricated in two or more 
rows, and with green tips. Disk florets tubu- 
lar, perfect, rays fertile, in one row, oblong, 
revolute when old. Receptacle flat, marked 
with pits. Pappus simple, hair-like, rongh. Achenium usually flattened. 
—A large genus of 2 herbs, very abundant in the United States, flower- 
ing in late summer and autumn. Leaves alternate; disk florets yellow, 
changing to purple; rays blue, purple, or white, never yellow.—The spe- 
cies are very variable, and many of them are hard to distinguish. 
Fig. 524. Aster patens. 
* Radical and lower leaves cordate and petiolate....a 
* Radical leaves never cordate.... 
a Heads in loose corymbs. Rays white or whitish....1, 2 
2 Heads in racemes or panicles, blue or bluish....b 
b Leaves evidently serrate; rays light blue, about 12, spreading #” ...3, 4 
b Leaves entire or nearly so; rays bright blue, spreading near 1’....5-7 
c Involucre scales tipped with green, or the outer ones wholly green....d 
o Involucre scales with scarious margins or wholly scarious....f£ 
