Obdbr 70.— ASTEEWOETS. 231 



S E. bellidifo'lium. Daisy F. Leaves nearly entire. Eays 50-80, bluiah-p. 



4 E. Philadel'phionm. Leaves nearly entire. Kays 150-200, reddish-purple. 



5 E. queroifo'lium. Oak-h. F. Lvs. sinuate-pinnatifl J-toothed. Kays 100-200. S. 



6 E. an'nuum. Annual F. Stem leafy, 3-5f. high. Leaves coarse-toothed. 



7 E. strigo'sum. Bough F. Stem leafy, 2-8f. high. Leaves nearly entire. 



8 E. nudicau'le. Naked F. Stem leafless, l-2f. high. Kays about 30. S. 



7. ACHILLE'A. Yarrow. MiUfoil. 



Heads many-flowered, rays few, fertile ; receptacle flat, chaffy ; achenia 

 flattened, margined, without a pappus. — If European herbs with small, 

 4^12-rayed heads in corymbs. June-Sept. 



1 A. millefo'lium. Leaves twice pinnatiiid with fine segments, Kays 4 or 5. c. 



2 A. Ptar'mica. Sneezewort. Leaves undivided, lanoe-linear, serrate. Kays 8-12. r. 



8. TARAX'AOTJM. Dan'delion. 



Involucre many-flowered, double, the outer of small scales much shorter 

 than the close, erect row of the inner. Eeceptacle 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'delion. 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 se^ds and seed-down, whose light and airy form is « very famil- 

 iar sight to all. 



9. HIEEA'OIUM. 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. — U Leaves alternate, entire, or toothed. 

 Florets yellow. Ju ly-Sep t. 



* Involucre and stalks smooth or nearly so a- 



* Involucre, stalks, &c., rough with glandular hairs b 



= Heads with 50 to 60 florets 1 



a Heads with 10 to 20 florets 2, 3 • 



b Heads with 40 to 50 florets 4 



b Heads with 20 to 30 florets 5, 6 



1 H. Oanaden'se. Canada B. Stem leafy, oorymbed at top. Leaves sharp- 

 toothed. N. 



