Class XIX, Order II. 299 



A beautiful species with a small corymb of large, white, 

 aromatic flowers. Compared with I he preceding it has a rough- 

 er stem, shorter petioles, leaves not sharply toothed nor acumi- 

 nate, flowers more than twice the size, but much fewer in num- 

 ber. Dry woods, Roxbury. August. Annual? 



SUPERFLUA. 



315. ARTEMISIA. 



ARTEMISIA CANADENSIS. MX. Sea H^ormivood. 



Stem decumbent ; leaves linear-pinnatifid ; branches 



bearing spikes ; flowers hemispherical, calyx scarious. 



Stem somewhat woody, smooth or pubescent. Leaves com- 

 pouuded of linear segments, once or twice pinnatifid. Flowers 

 small, very numerous, in terminal panicles resembling spikes. 

 On the sea beach, Plum island. August. Perennial. 



316. CONYZA. 



CONYZA CAMPHORATA. Muhl. S/)lcy Conyza. 



Leaves ovate-lanceolate, somewhat pubescent, acute, 

 serrate, serratures mucronate ; flowers in crowded 

 corymbs. 



Syn. ERIGERON CAMPHORATUM. L. 

 CoxrzA MARILAXDICA. Mich. 



An erect, rather succulent plant, of low stature. Stem thick, 

 fleshy, pubescent. Leaves alternate, sessile, ovate. Branches 

 axillar}', leafy, bearing close corymbs of oblong, purple flowers. 

 The plant, when bruised, exhales a strong, spicy, but rather dis- 

 agreeable odour. Salt Marshes. Cambridgeport. August. 



317. GNAPHALIUM. 

 GNAPHALIUM MARGARITACEUM. Common Life Everlasting. 



Herbaceous ; leaves linear lanceolate, acuminate, 

 alternate ; stem branched at top ; corymbs fastigiate. L. 



No object in the fields is better known than the dry, pearly, 

 and almost incorruptible heads of tho Life everlasting. The 



