COMPOSITE. (COMPOSITE FAMILY.) '2(37 



somewhat glandular, emitting a strong or camphoric odor, the heads cymosely 

 clustered. Flowers purplish, in summer. (Dedicated to the Abbe Plnrhe.) 



1. P. bifrons, DC. Perennial, 2-3 high; leaves closely sessile or half- 

 clasping, oblong to lanceolate, sharply denticulate, veiny (only 2 -3' long) ; 

 heads clustered in a corymb ; scales lanceolate. Low ground, Cape May, 

 N. J., and southward. 



2. P. camphorata, DC. (SALT-MARSH FLEABANE.) Annual, pale 

 (2-5 high); leaves scarcely petioled, oblong-ovate or lanceolate, thickish, 

 obscurely veiny, serrate ; corymb flat ; involucral scales ovate to lanceolate. 

 (P. foetida, DC.) Salt marshes, Mass, to Va., and southward, and on river- 

 banks westward to Ky., 111., and Neb. (?) 



29. EVAX, Gaertn. 



Heads rather many-flowered, discoid ; flowers as in Pluchea, the central usu- 

 ally sterile. Involucral scales few, woolly. Receptacle convex to subulate, 

 chaffy, the scarious chaff not embracing the smooth dorsally compressed 

 achenes. Anthers with tails or acutely sagittate ; pappus none. Low, densely 

 floccose-woolly anmials; extreme western. (Name of uncertain signification.) 



1. E. prolifera, Xutt. A span high or less, simple or branching from 

 the base ; leaves numerous, small and spatulate ; heads in dense proliferous 

 clusters ; receptacle convex ; chaff subtending the sterile flowers woolly-tipped, 

 the rest more scarious and naked, oval or oblong. Dak. and W. Kan. to Tex. 



30. F I LA GO, Tourn. COTTON-ROSE. 



Heads and flowers as in Evax. Receptacle elongated or top-shaped, naked 

 at the summit, but chaffy at the margins or toward the base; the chaff resem- 

 bling the proper involucral scales, each covering a single pistillate flower. 

 Achenes terete; pappus of the central flowers capillary, of the outer ones 

 mostly none. Annual, low, branching woolly herbs, with entire leaves, and 

 small heads in capitate clusters. (Name from Jilum, a thread, in allusion to 

 the cottony hairs of these plants.) 



F. GERMANICA, L. (HERUA IMPIA.) Stem erect, short, clothed with 

 lanceolate and upright crowded leaves, producing a capitate cluster of woolly 

 heads, from which rise one or more branches, each terminated by a similar 

 head, and so on ; hence the common name applied to it by the old botanists, 

 as if the offspring were undutifully exalting themselves above the parent. 

 Dry fields, N. Y. to Va. July - Oct. (Nat. from Eu.) 



31. ANTENNAE I A, Gaertn. EVERLASTING. 



Heads many-flowered, dioecious ; flowers all tubular ; pistillate corollas very 

 slender. Involucre dry and scarious, white or colored, imbricated. Recep- 

 tacle convex or flat, not chaffy. Anthers caudate. Achenes terete or flattish ; 

 pappus a single row of bristles, in the fertile flowers capillary, united at base 

 so as to fall in a ring, and in the sterile thickened and club-shaped or barbel- 

 late at the summit. Perennial white-woolly herbs, with entire leaves and 

 corymbed (rarely single) heads. Corolla yellowish. (Name from the resem- 

 blance of the sterile pappus to the antenna' of certain insects.) 



1 A. plantaginif61ia, Hook. (PLANTAIN-LEAVED EVERLASTING.) 

 Spreading by offsets and runners, low (3-18' high) ; leaves silky -woolly when 

 young, at length green above and hoary beneath ; those of the simple and sea] e 



