404 



CARDUACEAE. 



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. 



1. Anthemis Cotula L. 



MAYWEED. . DOG'S, OR FETID 

 CAMOMILE. (Fig. 445.) An- 

 nual, glandular and with a fetid 

 odor and acrid taste, much 

 branched, l-2 high. Leaves 

 mostly sessile, l'-2' long, finely 

 1-3-pinnately dissected into 

 narrow, or almost filiform, 

 acute lobes; heads commonly 

 numerous, about 1' 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. 



Waste grounds and lawns, 

 occasional. Sometimes cultivated. 

 Introduced. Native of Europe. 

 Widely naturalized in North 

 America. Flowers in spring and 

 summer. 



20. CHRYSANTHEMUM [Tourn.] 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 hemi- 

 spheric or depressed, its bracts appressed, imbricated in several series, the 

 outer shorter. Eeceptacle flat, convex or hemispheric, naked. Eay-flowers 

 pistillate, fertile, the rays white, yellow or rose-colored, entire or toothed. 

 Disk-flowers perfect, fertile, their corollas with terete or '2-winged tubes and 

 4-5-cleft limbs. Anthers obtuse and entire at the base. Style-branches of the 

 disk-flowers truncate, penicillate. Achenes angled or terete, 5-10-ribbed, those 

 of the ray-flowers commonly 3-angled. Pappus none or a scaly cup. [Greek, 

 golden-flower.] About 100 species, of wide distribution in the northern hemi- 

 sphere. Type species: Chrysanthemum coronarium L. 



Heads large, solitary or few ; leaves obovate to spatulate, dentate or incised. 



1. C. Leucanthemum. 

 Heads small, numerous, corymbose ; leaves pinnately parted 



or pinnatifid 2. C. Parthenium. 



