COMPOSITAE (COMPOSITE FAMILY) 



847 



1007. M. inodora. 

 Leaf x 1%. 



N. Y., and Pa.; 



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. CnAMOMf LLA 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.) v v 

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

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

 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. , 

 also about St. Louis, Mo.; naturalized, probably from the 



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



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, pinnatifid, or divided leaves, and 

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

 (Old Greek name, -^pva^vQ^Qv, i.e. golden flower.} 



* Heads large, solitary, terminating the long branches. 



1. C. LEUCANTHEMUM 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. piNNATfriDUM 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. subpinnatijidum Fernald.) 

 Fields and meadows, throughout ; an 

 abundant and pernicious weed eastw. 

 (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. TANACETOIDES Boiss. (COSTMARY, MINT GERA- 

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



1008. C. Leucantheinum. 

 Leaves x %. 



1009. C. Leuc., 



v. pinnat. 

 Leaves x'. 



