Pluchea. COilPOSIT.E, 225 



stramineous. — Syn. ii, 425; Hook. & Am. Bot. Beech, i. 31 {if^Jiun !-/scoso, "Ruiz & Pav, 

 ••^vst. 207 ). Li. glutinosa, B. crrrukicrns, & B. Alamani, DC. Prodr. 1. c. 4U2. 403. B. Piurjrirn 

 Xutt. Tians. -Viii. Phil. Sue. 1. c. 337, excl. syn. B glutinosa & B. aerulesrens, Gr^v, Bot, 

 t'aUf. i. 333. — .Vlujig streams and in moist ground, S. Cahfornia, from Los ,\ngelc-.s south- 

 ■ward, and through Arizona to .S. Colorado and the horders of Texas ; fl. late in autumn 

 (Mex. to Chili.) 

 B. viminea, DC. Stems truly slirubhy, 6 to 12 feet high, producing shnrt lateral flowering 

 brandies, tliese terete and minutely .-triate : leaves lanceolate, entire or some .sparingly den- 

 ticulate, oljscurely 3-nerved, 2 or 3 inches long, or much smaller on the flowering shunts : 

 heads usually 4 lines long, hemispherical, in small cvmose clusters terminating numerous 

 lateral branchlets : involucre tawny. — Prodr. v, 400; Gray, Bot. Calif, i. 333. — Along 

 streams, California, from ^Monterey southward and to San Bernardino Co.; flowering in 

 early spring ; the foliage persisting all winter. 



Teibe IV. IXULOIDE.E, p. 57. 



52. PLlJCHEA, Cas.s. (For the AbW X A. Pluche, an amateur natu- 

 ralist of the latter part of the eighteenth centur}'.) — "Warm-temperate or tropical 

 plants ; with alternate pinnately veined leaves, and heads of flesh-colored or duU 

 purple flowers, cymosely or paniculatel}' disposed or rarely solitary at the sum- 

 mit of the stem or branches. — Cuss. Bull. Philom. 1817, & Diet. Sei. Xat. xlii.; 

 Benth. ct Hook. Gen. ii. 2 'JO. 



§ 1. Berthelotia. Pappus of the hermaphrodite-sterile (or rarely fertile) 

 flovi'ers of more rigid bristles with clavellate-dihited tips : involucre chartaceo- 

 coriaceous ; the innermost narrowly linear and deciduous with the flowers. A'ery 

 leafy sericeous-canescent shrubs. — Gray, Proc. Am. Acad. xvii. 212. Berthelotia, 

 DC. Prodr. v. 37.5. 



P. borealis, Gr-iy, 1. L-. (Cachimilla, Akeow-wood.) Shrub several feet high, much 

 branched, willow-like, very leafy up to the cymulose-glomerate heads, silvery with the very 

 close and fine appressed pubescence : leaves entire, linear-lanceolate, sessile, acute at both 

 ends : involucre campanulate ; its outer bracts ovate, obtuse, tomentose : bristles of the 

 pappus of the central flowers little stouter than of the others, but with abruptly enlarged 

 tips, not united at base: style of the same entire. — r.^-< '//a honalis, Torr. & Gray, in 

 EmorvEep. (Notes of Eecoimoissance, 1848) 143; & Sitgreaves Eep. 162, t. .5; Gray, PI. 

 Pendi 7:"), PI. Wright, i. 102 (§ Phnlnrrodine), & Bot. Calif, i. 334. P;] ,/ pappus sericeus, 

 Nntt. PI. Gamb. 1 78. — Sandy banks uf streams, from the Eio Grande on the western borders 

 of Texas to S. California: fl. summer. 



§ 2. STYxnixrs. Pappus of both kinds of flowers fine and similar, more or 

 less soft, none of the bristles at all thickened at tip: bracts of the involucre 

 thin or tliinnish: corolla of the hermaphrodite flowers somewhat enlarged 

 upward: heavy-scented herbs, or in the tropics shrubby, somewhat puljescent 

 and glandular, with membranaceous or slightly succident pinnately-veiny leaves, 

 commonly with some callous-mucronate teeth: heads cymose-clustered : flowers 

 dull purple, in late summer or autumn. — Stylimmts & Gynema, Raf. in Jour. 

 Phys. 1«K1, & Ann. Xat. 1820, 15. LejAogyne, Ell. Sk. ii. 322, as subgenus. 

 Pluchea iStyUmnus) § 3, DC. Prodr. v. 4.31. 



The first of the following species may fairly retain the now established name, 

 rather than have a new one made ; but Conyza hifrons was founded by Linna;us 

 on European Inulce. viz. on Hermann's figure, which in ed. 2 he refers to that 

 genus, and on one of Plukenet's (mistaken for Canadian), which is certainly 

 /. Mfrons, as his herbarium shows. Of the many names for our second species, 



15 



