COMPOSITAE. 



VOL. III. 



4. Achillea borealis Bongard. Northern Yar- 

 row. Fig. 4555. 



Achillea borealis Bongard, Veg. Sitch. 149. 1831. 



More or less silky-woolly; stem erect, 16' high or 

 less. Leaves deeply bipinnatifid into narrow crowded 

 lobes and segments, those of the stem few, sessile 

 or nearly so, the ultimate divisions very small ; co- 

 rymb dense, strongly convex, 2*' broad, or less; in- 

 volucre about 3" high, its bracts with broad black or 

 blackish margins; rays 10-20, white or pink, broadly 

 oblong or suborbicular, often 2.\" broad. 



In wet places, on hillsides and rocks, Newfoundland 

 to Quebec and Alaska. Summer. Rocky Mountain 

 plants referred to this species appear to be distinct 

 from it. 



90. ANTHEMIS [Micheli] L. Sp. PI. 893. 1753. 



Annual or perennial herbs, with pinnatifid or dissected, alternate leaves, and usually large 

 peduncled heads of both tubular and radiate flowers, terminating the branches, or heads 

 rarely rayless. Involucre hemispheric, its bracts imbricated in several series, scarious-margined, 

 appressed, the outer shorter. Receptacle convex, conic or oblong, chaffy at least toward the 

 summit, the chaff subtending the disk-flowers. Ray-flowers pistillate and fertile, or neutral, 

 the tube terete or 2-winged, the ray white or yellow, entire or 2-3-toothed. Disk-flowers 

 perfect, fertile, yellow, their corollas with 5-cleft limbs. Anthers obtuse and entire at the 

 base. Style-branches of the disk-flowers truncate. Achenes oblong, angled, ribbed or striate. 

 Pappus none, or a short coroniform border. [Greek name of Camomile.] 



About 60 species, natives of Europe, Asia and Africa. Type species : Anthemis maritima L. 

 Rays white. 



Rays neutral ; plant glabrous, or nearly so, fetid. i. A. Cotula. 



Rays pistillate ; plants pubescent. 



Annual ; chaff of the receptacle acute. 2. A. arvensis. 



Perennial ; chaff of the receptacle obtuse. 3. A. nobilis. 



Rays yellow; plant pubescent, or tomentose. 4. A. tinctoria. 



i. Anthemis Cotula L. Mayweed. Dog's or Fetid Camomile. 

 Dillweed. Fig. 4556. 



Anthemis Cotula L. Sp. PL 894. 1753. 

 Maruta Copula DC. Prodr. 6: 13. 1837. 



Annual, glabrous, or sometimes pubescent 

 above, glandular and with a fetid odor and 

 acrid taste, much branched, i-2 high. Leaves 

 mostly sessile, i'-2 f long, finely i-3-pinnately 

 dissected into narrow, or almost filiform, acute 

 lobes ; heads commonly numerous, about i' 

 broad; bracts of the involucre oblong, obtuse 

 or obtusish, usually somewhat tomentose; rays 

 10-18, white, at length reflexed, neutral, or 

 rarely with abortive pistils, mostly 3-toothed; 

 receptacle convex, becoming oblong, its chaff 

 bristly, subtending the central flowers ; achenes 

 lo-ribbed, rugose or glandular-tuberculate ; 

 pappus none. 



In fields, waste places and along roadsides, all 

 over North America except the extreme north. 

 Naturalized from Europe, and widely distributed 

 as a weed in Asia, Africa and Australia. Other 

 names are mather, dog- or hog's-fennel, dog-finkle, 

 morgan. Dog-daisy. Pig-sty-daisy. Maise. Chig- 

 ger-weed. Balders. June-Nov. 



