336 CLASS XIX. ORDER II. 



349. HELENIUM. 



Helenium AUTUMNALE. L. Fall Sun Flotocr. 



Leaves lanceolate, serrate, somewhat deciirrent; 

 stem corymbed ; flowers of the disc five cleft, those of 

 the ray flat, reflexed. 



Resembles a small sun flower ; two or three feet high, flowers 

 bright yellow. — Found in Berkshire. Prof. Hitchcock. 



350. ANTHEMIS. 



Antiiemis cotula. L. May Weed. 



Receptacle conical, its scales bristle shaped ; seeds 

 without any border ; leaves doubly pinnatifid, sraooth- 

 ish. Sm. 



The road sides are full of the white blossoms of this common, 

 annual weed, from midsummer to the end of autumn. Stem 

 upright, smooth, much branched. Leaves alternate, sessile, 

 nearly smooth, divided and subdivided into linear segments. 

 Flower stalks solitary, striated. Calyx scales narrow, slightly 

 margined. Florets of the ray white, spreading, a dozen or more 

 in number. Disc yellow, convex. Receptacle nearly cylindri- 

 cal. The plant has a strong, peculiar smell, and reputed 

 medicinal virtues. 



351. ACHILLEA. 



Achillea ptarmtca. L. Goose tongue. 



Leaves lanceolate, acuminate, sharply serrate. 



Introduced from Europe. Stem erect, leafy, two feet high. 

 Leaves simple, narrow lanceolate, sharply and regularly serrate, 

 smooth. Flowers terminal, corymbed, white. Calyx somewhat 

 hemispherical, imbricated, hairy. Florets of the ray eight or 

 ten, flat, obcordate. — Danvers. Mr. Oakes. — July, August. 



AcHiLt^EA MILLEFOLIUM. L. Cojuiiion Yarroic. 



Leaves bipinnatifid, hairy, their divisions linear, 

 toothed, mucronate ; stems furrowed. Sni. 



Common Yarrow is a frequent inhabitant of dry pastures and 



