"ISS COMPOSITE, (composite family.) 



64. GAILLARDIA, Foug. 



Heads many-flowered ; rays 3-cleft or -toothed, neutral or sometimes fertile, 

 or none. Involuoral scales in 2-3 rows, the outer larger, loose and foliaeeous 

 Receptacle convex to globose, beset witli bristle-like or subulate or short and 

 soft chaff. Achenes top-shaped, 5-costate, villous; pappus of 5-10 long thin 

 scales, awn-tipped by the excurrent nerve. — Erect herbs with alternate leaves 

 and large showy heads of yellow or purplish fragrant flowers on terminal or 

 scapiform peduncles. (Xamed after Gaillard de Merentonneau.) 



1. G. simplex, Scheele. Annual; leaves all radical, usually spatulate, 

 pinnatifid to entire ; head globose on a naked scape, usually ray less. — S. Kan. 

 to Tex. 



2. G. lanceolata, Michx. Annual, leafy stemmed, branched, 1-2° high, 

 finely pubescent ; leaves oblanceolate to linear, mostly entire ; rays rather few 

 or none ; chaff very short or obsolete. — S. Kan. to Tex. and Fla. 



3. G. aristata, Pursh. Perennial, hirsute, often 2° high ; leaves lanceo- 

 late to oblanceolate, broad or narrow, entire to coarsely pinnatifid; rays usually 

 numerous and long ; chaff bristly or subulate. — N, Dak., west and southward. 



65. DYSODIA, Cav. Fetid Marigold. 



Heads many-flowered, usually radiate ; rays pistillate. Involucre of one row 

 of scales united into a firm cup, at the base some loose bractlets. Receptacle 

 flat, not chaffy, but beset with short chaffy bristles. Achenes slender, 4-augled ; 

 pappus a row of chaffy scales dissected into numerous rough bristles. — Herbs, 

 mostly annuals or biennials, dotted with large pellucid glands, which give a 

 strong odor (as in Tagetes, the French Marigold of the gardens, which 

 ])elongs to the same group) ; heads terminating the branches ; flowers yellow. 

 (Name Suo-wS/a, an ill smell, which the plants exemplify.) 



1 . D. chrysanthemoides, Lag. Nearly smooth, diffusely branched (6 - 

 18' high) ; leaves opposite, pinnately parted, the narrow lobes bristly-toothed 

 or cut ; rays few, scarcely exceeding the involucre. — Roadsides, and banks of 

 rivers, Minn, to HI., Tenn.. and southwestward. Aug. - Oct. 



66. A NT HE MIS, L. Chamomile. 



Heads many-flowered, radiate ; rays pistillate or (in n. 1) neutral. Involucre 

 hemisphericaf, of many small imbricated dry and scarious scales shorter tlian 

 the disk. Receptacle' conical, with slende/ chaff at least near the summit. 

 Achenes terete or ribbed, glabrous, truncate ; pappus none or a minute crown. 



— Branching strong-scented herbs, with finely pinnately dissected leaves and 

 solitary terminal heads ; rays white; disk yellow /'A;/6i"e;Uis, the ancient Greek 

 name of the Chamomile.) 



A. CoTLLA, DC. (May-weed.) Annual, acrid; rays mostly neutral; 

 receptacle without chaff near the margin ; pappus none ; leaves finely 3-pin- 

 nately dissected. (Maruta Cotula, X'C.) — Common by roadsides. (Nat. 

 from Eu.) 



A. ARVENSis, L. (Corn Chamomile.) Pubescent animal or biennial, 

 resembling May-weed, but not ill-scented ; leaves less finely 1 - 2-pinnately 

 parted , chaff of the receptacle lanceolate, pointed ; pappus a minute border 



— Waste places ; rare. (Adv. from Eu.) 



A. NOBiLis, L. (Garden Chamomile.) More downy and perennial, 

 pleasantlv stroncj-scented ; sterile shoots depressed or creeping ; leaves very 



