Matrintrln. CO^^POSn^K ^Q] 



none or a sliort chafTy crown. — Herbs, of numerous species in tlie Old World, a 

 very few have bocomo roadside weeds in the United States. The only common 

 one is the May-weed, which has reached California, viz., 



1. A. Cotula, Linn. A much branched, somewhat pubescent, strong-scented 

 and acrid annual, a foot or less high : the alternate leaves tlirice pinnately divided 

 into small linear-subulate lobes : heads rather small terminating the branches, 

 somewhat corymbose : rays soon refle.xed, white, sterile, having an imj)erfect stylo 

 or none : disk-flowers yellow : receptacle conical, naked toward the margiu, but 

 with almost bristle-sha[)ed chaff near the centre : ])appus none. — Maruta Cotula, 

 Cass. : differing from true Anthemis in the sterile rays, &c. 

 Sparingly found along roadsides : introduced, but not yet common. 



91. CHRYSANTHEMUM, Linn. 



Head many-flowered, with numerous pistillate rays; the disk-flowers usually all 

 fertile. Involucre hemisj)herical or flatter; the more or less scarious short and 

 appressed scales imbricated in several series. liece[)tacle flat or convex, naked. 

 Rays usually elongated : tlisk-corollas often flattened (obcomprcssed) or 2-winged 

 below, 4 - 5-toothed. Akenes sliort, nearly terete, several-ribbed or angled, trun- 

 cate at the tip, mostly (in ours) destitute of i)appus. 



A laige and diversified genus in the Old World (especially when it includes Leucanthemum and 

 Pi/reihrum), but not indigenous to North America except in the arctic regions. Only one species 

 is much naturalized in the United States, viz. 



1. C. Leucanthemum, Linn. A perennial wcimI, spreading from sliort run- 

 ning rootstocks, nearly glabrous, a foot or two high : steins siiiii>le or sparingly 

 branched, the naked summit bearing a large head: leaves incisely pinnatifid or 

 toothed ; the lower spatulate ; the upper becoming linear and smaller : scales of the 

 involucre with somewhat rusty tips : rays white (over half an inch long) : disk 

 yellow : akenes many-ribbed. — Leucanthemum vuhjare, I^ain. 



In fields nt Santa Cruz ; jirobably in some ntlier ]ilaces : introduced from the Old AVorld. Not 

 yet, perhajts may not become, in California the troublesome weed that it is in the Atlantic States, 

 whore it takes possession of meadows, and is known as O.r-cye. ]),xisy. White Daisii, and fFhilf\ 



V'Ct<.(f. 



92. MATRICARIA, binn. 

 Head many-flowered, with or without rays. Involucre hemis[)hcri(ml or flatter, 

 of numerous and more or less scarious appressed scales in few series. Keccj)tacle 

 conical or ovate, naked. Corollas, akenes, &c., as in the preceding genus. Pai)pus 

 none or a minute crown. — A rather large genus of the Old World; only the fol- 

 lowing on the Pacific coast, where it is apparently indigenous. 



1. M. diSCOidea, DC. Annual, a span or two high, branching, glabrous, 

 leafy : leaves twice or thrice pinnately dissected into numerous short and narrow 

 linear divisions : heads small, short-pedunclod : involucre of broadly oval scales 

 with white-scarious margins: rays none: disk greenish-yellow, much elevated: 

 receptacle high conical : akenes with an obscure coroniform margin in place nf pap- 

 pus. — Af. (auacetoideK, Fischer k ]\Ieyer. Santolinn suaven/enx, I'ursh. Tnnacetum 

 matricarioides, Less. 7\ suaveolevs, Hook. T. panciflornm, DC. Arteminin matri- 

 carinides, Less. Cntvla. matricarioiden, Bongard. Lepidnthcrn (in errata) or Lrpi- 

 danthus snaveofens, Nutt. in Trans. Amer. Phil. Soc. 



Waste grounds, through the whole length of the State, and north to Unnlnskn. It has 

 migrated to and beyond tlio Mississinjii us a weed, as also to some iilnces in the north of Europe. 

 Said to be used in C'alifornia as a domestii; remedy for agues and bowel-complaints. IloAda a 

 quarter of an inch, or in fiuit half an inch in length, greenisli-yellow. 



