10 14 FLORA. 



-- \ . " 



85. ANTHEMIS L. 



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

 usually large peduncled heads of both tubular and radiate flowers, terminating the 

 branches. 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 corol- 

 las with 5-cleft limbs. Anthers obtuse and entire at the base. Style-branches of 

 the disk-flowers txuncate. 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. 



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. 



1. Anthemis Cotula L. MAYWEED. DOG'S, OR FETID CAMOMILE. DILL- 

 WEED. (I. F. f. 3984. ) Annual, glandular and with a fetid odor and acrid taste, 

 much branched, 3-6 dm. high. Leaves mostly sessile, 3-5 cm. long, finely 1-3- 

 pinnately dissected into narrow, or almost filiform, acute lobes; heads commonly 

 numerous, about 25 mm. broad; bracts of the involucre oblong, obtuse or obtusish, 

 usually somewhat tomentose; rays 10-18, mostly 3-toothed; receptacle convex, 

 becoming oblong, its chaff bristly, subtending the central flowers; achenes 10- 

 ribbed, rugose or glandular-tuberculate; pappus none. In fields, waste places and 

 along roadsides, all over N. Am., except the extreme north. Nat. from Europe. 

 June-No v. 



2. Anthemis arvensis L. CORN OR FIELD CAMOMILE. (I. F. f. 3985.) 

 Annual or sometimes biennial, not fetid; stem finely pubescent, usually much 

 branched, about 3 dm. high, the branches decumbent or ascending. Leaves sessile. 

 3 -9 cm. long. 1-2 pinnately parted into linear or lanceolate acute lobes, less divided 

 than those of the preceding species and with broader segments; heads commonly 

 numerous, 3-4 cm. broad; bracts of the involucre oblong, obtuse, usually some- 

 what pubescent, with broad scarious margins; rays 10-18, mostly 2-toothed; chaff 

 of the obtuse receptacle lanceolate; achenes oblong, obtusely 4-angled; pappus a 

 mere border. In fields and waste places, N. S. to Va., west to Mich., Mo., and on 

 the Pacific coast. Nat. from Europe. May -Aug. 



3. Anthemis nobilis L. GARDEN, SCOTCH, WHITE OR Low CAMOMILE. 

 (L F. f. 3986.) Perennial, pubescent, aromatic, much branched. 1.5-4.5 dm. high, 

 the branches procumbent. Leaves numerous, 3-5 cm. long, finely and compactly 

 dissected into nearly filiform lobes and segments; heads about 25 mm. broad; bracts 

 of the involucre obtuse, pubescent, their scarious margins broad; rays 12-18, 

 2-3-toothed; chaff of the conic receptacle broad, membranous; achenes oblong, 

 obtusely 3-angled; pappus none. Sparingly escaped from gardens, R. I. to Del. 

 and Mich. Adventive from Europe. June-Aug. 



4. Anthemis tinctoria L. YELLOW OR OX-EYE CAMOMILE. (L F. f. 3987.) 

 Perennial; stem erect, branched, 3-9 dm. high, with nearly erect branches. Leaves 

 sessile, 3-7 cm. long, pinnately divided, the oblong segments pinnatifid into narrow 

 acute lobes; heads few or several, 3-4 cm. broad; bracts of the involucre oblong, 

 obtuse, densely tomentose; rays 20-30, pistillate, usually 2-toothed; chaff of the 

 nearly hemispheric receptacle lanceolate, acuminate, rather rigid; achenes 4-angled, 

 somewhat compressed ; pappus a crown-like border. In fields and waste places, 

 Me. to N. J., and locally escaped from gardens. Adventive from Europe. June- 

 Sept. 



86. CHRYSANTHEMUM L. 



Perennial or annual, mostly erect and branching herbs, with alternate dentate 

 incised or dissected leaves, and large, usually long-peduncled heads of both tubular 

 and radiate flowers, or rays rarely wanting. Involucre hemispheric or depressed, 



