COMPOSITyK. (COMI'OSITK lAMII.V.) 267 



somewhat plandnlar, emittino: a strong or camphoric odor, the heads cymosely 

 clustered. Flowers purjjlish, iii summer. (Dedicated to the Abbe Pluche.) 



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

 claspiii;/, ohlou^ to lanceolate, sharply denticulate, veiny (only 2-3' long); 

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

 N. J., and sinithward. 



2. P. camphorata, DC. (S.vi.t-m.\i:.sii Fi.KAnAM:.) AmiiKil, pale 

 (2-5° high); Icai-es scared i/ petiolcd, <)l)l()ng-ovate or lanceolate, thickish, 

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

 (P. fcetida, DC.) — Salt marshes, Ahiss. to \'a., and southward, and on river- 

 banks westward to Ky., 111., and Nel). (!) 



29. EVA X, Caertn. 



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

 ally sterile. Involucral scales few, woolly. Keceptacle 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 annuals; extreme western. (Name of uncertain signification.) 



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

 tlie base; leaves numei'ous, 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. FILAGO, Tourn. Cottox-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 sijigle pistillate flower. 

 Achenes terete; pap])us of the central flowers capillary, of the outer ones 

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

 small heads in ca])itate clusters. (Name from Jilum, a thread, in allusion to 

 the cottony hairs of these plants.) 



F. GermAnica, L. (Hekha Impia.) Stem erect, short, clothed with 

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

 heads, from which rise one t)r more branches, each terminated liy a similar 

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

 as if the offspring were undutifullv exalting themselves above the parent. — 

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



31. ANTENNARIA, 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 bri.stles, in the fertile flowers capillary, united at base 

 so as to fall in a ring, and in the sterile thickened and clul)-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 tlie sterile pa])])us to the antenmv of certain insects.) 



1 A. plantaginifblia, Hook. (Plantain-leaved Everlastini;.) 

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

 young, at length green above and hoary beneath ; those of the simj)le and scaj e 



