COMPOSITAE (COMPOSITE FAMILY) 



847 



strongly 3-ribbed ; pappus a short crown or border. Road- 

 sides and fields, Nfd. to Ct. and Mich. ; abundant in e. Me. and 

 adjacent Canada. July, Aug. (Nat. from Eu.) FIG. 1007. 



2. M. CIIAMOMILLA L. Similar; heads smaller, about 2 

 cm. broad ; rays shorter ; receptacle more convex ; achenes 

 less distinctly ribbed ; pappus obsolete. Roadsides and waste 

 places, Atlantic States, west to O. (Adv. from Eu.) 



3. M. SUAVEOLENS (Pursh) Buchenau. (PINEAPPLE-WEED.) 

 Low ; leaves 2-3-pinnately-parted into short linear lobes ; 

 heads rayless, short-peduncled ; bracts oval, with broad mar- 

 gins, much shorter than the conical disk ; achenes more 

 terete ; pappus obsolete ; odor of the bruised plant suggesting 

 pineapple. (M. discoidea DC.; M. matricarioides Porter.) 

 Roadsides and old fields, locally abundant in N. B. , N. E. , 



N. Y., and Pa.; also about St. Louis, Mo.; naturalized, probably from the 

 Pacific slope, where it is common. (Established in n. Eu.) 



100T. M. inodora. 

 Leaf x 1%. 



70. CHRYSANTHEMUM [Tourn.] L. OX-EYE DAISY 



Heads many-flowered ; rays numerous, fertile. Scales of the broad and flat 

 involucre imbricated, with scarious margins. Receptacle flat or convex, naked. 

 Disk-corollas with a flattened tube. Achenes of disk and ray similar, striate. 

 Annual or perennial herbs, with toothed, pirmatifid, or divided leaves, and 

 single or corymbed heads. Rays white or yellow (rarely wanting); disk yellow. 

 (Old Greek name, xP vff ^ vdf ^ Qv i i- e - golden flower.) 



* Heads large, solitary, terminating the long branches. 



1. C. LEUC!NTHEMUM L. (OX-EYE or WHITE DAISY, MARGUERITE, WHITE- 

 WEED.) Stem erect, simple or forked toward the summit; basal leaves spatu- 

 late-obovate, on long slender petioles, the blades crenate-dentate ; middle and 

 upper stem-leaves oblong or oblanceolate, coarsely and 

 regularly crenate or dentate above, with larger spreading 

 teeth at base; heads 4-6 cm. broad; involucral bracts 

 narrow, brown-margined ; rays white (rarely tubular, 

 laciniate, or deformed). Fields, etc., Nfd. and e. Que. 



to N. J.; rare southw. June-Aug. 



(Nat. from Eu.) FIG. 1008. 



Var. PINNAT^FIDUM Lecoq & La- 



motte. Basal leaves pinnatifid, subpin- 



natifid, or coarsely and irregularly 



toothed ; middle and upper stem-leaves 



narrowly oblong or oblanceolate, con- 



spicuously subpinnatifid at base ; heads 



usually smaller than in the typical 



form. (Var. subpinnatiftdum Fernald.) 



Fields and meadows, throughout ; an 1008> c Le ucantheinum. 



abundant and pernicious weed eastw. Leaves x % 



(Nat. from Eu.) FIG. 1009. 



2. C. SEGETUM L. (CORN CHRYSANTHEMUM, CORN MARI- 



GOLD.) Similar ; leaves oblong, somewhat clasping, coarsely 



toothed or pinnatifid ; rays golden-yellow ; bracts broad and 



scarious. Ballast along the coast, N. B. to N. J.; also in fields 

 near Schenectady, N. Y. (Wibbe). (Adv. from Eu.) 

 * * Heads small, corymbed. 



3. C. PARTHENIUM (L.) Bernh. (FEVERFEW.) Tall, branched, leafy ; leaves 

 bipinnately divided, the divisions ovate, cut; rays white. Escaped from gar- 

 dens, and naturalized in some places. (Introd. from Eu.) 



4. C. BALSAMITA L., var. TANACETO!DES Boiss. (COSTMARY, MINT GERA- 

 NIUM.) Leaves oblong, crenate, the upper sessile, the lower petioled, often 



1009. C. Leuc., 



v. pinnat. 

 Leaves x %. 



