ORDER 70.—ASTERWORTS. 231 
8 E, bellidifo’lium. Daisy F. Leaves nearly entire. Rays 50-80, bluish-p. 
4 E, Philadel’phicum. Leaves nearly entire. Rays 150-200, reddish-purple. 
5 EB, quercifo’lium. Oak-lo. F. Lys. sinuate-pinnatifid-toothed. Rays 100-200, 8. 
6 E.an’nuum, Annual F. Stem leafy, 3-5f. high. Leaves coarse-toothed. 
7 E. strigo’sum, Rough F. Stem leafy, 2-3f. high. Leaves nearly entire. 
8 E. nudicau’le. Naked F. Stem leafless, 1-2f. high. Rays about 30. S. 
7. ACHILLE’A. Yarrow. Millfoil. 
Heads many-flowered, rays few, fertile; receptacle flat, chaffy ; achenia 
flattened, margined, without a pappus.—2 European herbs with small, 
4-12-rayed heads in corymbs. June—Sept. 
1 A, millefo/lium. Leaves twice pinnatifid with fine segments. Rays4or5. « 
2 A, Ptar’mica. Sneezewort. Leaves undivided, lance-linear, serrate. Rays 8-12. 7. 
8. TARAX’ACUM. Dan’delion. 
Involucre many-flowered, double, the outer of small scales much shorter 
than the close, erect row of the inner. Receptacle naked. Achenia pro- 
duced into a long beak crowned with copious white, hair-like bristles of 
the pappus.—Acaulescent herbs with runcinate leaves. (Figs. 504-506.) 
T. Dens-leo’nis, Dan’ddion. Outer scales of the involucre reflexed. Leaves run- 
cinate, smooth, dentate.—In all open situations, blossoming at all seasons ex- 
cept winter. Scape round, hollow, lengthening after flowering, and bearing a 
globular head of seeds and seed-down, whose light and airy form is a very famil- 
iar sight to all. 
9. HIERA’CIUM. Hawkweed. 
Involucre more or less imbricated, egg-shaped, many-flowered. Ache- 
nia not prolonged into a beak, striate. Pappus of rough, brittle, numerous 
tawny bristles in a single row.—2 Leaves alternate, entire, or toothed. 
Florets yellow. July—Sept. 
* Involucre and stalks smooth or nearly so....a 
* Involucre, stalks, &c., rough with glandular hairs....b 
a Heads with 50 to 60 florets....1 
a Heads with 10 to 20 florets....2, 8 
b Heads with 40 to 50 florets....4 
b Heads with 20 to 30 florets....5, 6 
1 H. Canaden’se. Canada H. Stem leafy, corymbed at top. Leaves sharp- 
toothed. N. 
