OOMPOSIIAE. 341 



43. MATRICARIA L. 



1. Matricaria inodoea L. Wild Chamomile. M. p, 1016. Ballast. Sum- 

 mer. 

 Philadelphia— Greenwich Point (Te.). 

 Camden— Kaighn's Point, Mart. (B. C.) (Ja.). 



44. TANACETUM L. 



1. Tanaobtum vulgaris L. Tansy. M. p. 1016. Roadsides, escaped from 

 gardens. Summer. 



45. ARTEMISIA L. Wormwood. 



Marginal flowers pistillate; central flowers perfect, sterile. 



1. A. caudata. 

 Marginal flowers pistillate; central flowers perfect, fertile. 



Receptacle villous-pubescent. 2. A. Absinthium. 



Receptacle glabrous or sparingly pubescent. 



Leaves dissected, glabrous or pubescent, green, not tomentose. 

 Leaves finely 2-3-pinnately divided; heads paniculate. 



3. A. annua. 

 Leaves pinnately divided; segments pinnatifid; heads in leafy 

 spikes. 4. A. biennis. 



Leaves densely white-canescent or tomentose, at least beneath. 

 Leaves pinnatifid or dissected. 



Heads 6-8 mm. broad; racemose-glomerate; sea-beach 



plant. 5. A. Stelleriana. 



Heads 2-4 mm. broad, spicate-paniculate or racemose. 



Leaves deeply pinnatifid, the segments mostly incised. 



6. A. vulgaris. 

 Leaves finely dissected into short, linear lobes. 



7. A. Pontica. 

 Leaves lanceolate, oblanceolate or linear, serrate, somewhat 



lobed or entire, not pinnatifid. 8. A. gnaphalodes. 



1. Artemisia caudata Michx. M. p. 1018. Dry, sandy soil. Summer. 



New Jersey— Common in the pine-barrens, especially near the coast. 



2. Artemisia Absinthium L. M. p. 1019. Waste places and ballast. 



Summer. 

 Philadelphia— Woodlands Cemetery (Gi.), Greenwich Point (Te.). 



3. Artemisia annua L. M. p. 1019. Waste places. Summer. 



Bucks— Nockamixon (Fr.) (Ja.). Delaware — (P.). Northampton — 

 Easton, Porter (B. C). 



Camden— Kaighn's Point (Ja.). 



New Castle — Clayton Street near Delaware Avenue, Tatnall; Brandy- 

 wine Park, north side, F. Guiney. 



4. Artemisia biennis Willd. M. p. 1019. Waste places. Summer. 



Philadelphia— Navy Yard (Ca.), Gibson's Point (Mac). 

 Camden— Kaighn's Point (Ja.) (Wn.). 

 New Castle — New Castle, Commons. 



5. Artemisia Stelleriana Bess. M. p. 1019. Escaped from cultivation. 



Summer. 

 Cape May— Wildwood (Ja.) (Wn.), Sewell's Point (VP.). Ocean— 

 Beach Haven (Li.), Toms River (C). Monmouth — Sandy Hook, High- 

 lands (C). 



