338 COMPOSITE. Palafoxia. 



the involucre obovate-spatulate, very obtuse, thin, mainly whitish, some outer or accessory 

 bracts narrower and shorter, partly herbaceous : corollas white or flesh-color : paleaj of the 

 pappus little shorter than the akenes, linear-lanceolate, gradually attenuate, more or less 

 pointed by the excurrent tip of the strong costa. — Gen. ii. 139; Ell. Sk. ii. 31-t, not DC. 

 Pcileolaria Jhstiylata, hess. Syn. loQ. Palafoxia fustl(jiata, DC. Prodr. v. 125. P. inte<jrl- 

 folia, Torr. & Gray, Fl. ii. 269. — Pine barrens, Georgia and Florida ; first coll. by Dr. 

 Baldwin. 



151. PAL AFOXI A, Lag. (Jose Pcdafox, noted Spanish general.) — Her- 

 baceous or suffruticose plants (of Mexico and the IT. S. borders) ; with branching 

 stems, rather large scattered or loosely cymosely disposed pedunculate heads of 

 flesh-colored or whitish flowers ; the leaves linear to oblong, alternate, entire, the 

 lower short-petioled. — Nov. Gen. & Spec. 26 (Elench. Hort. Maclr. 1815); Gray, 

 Proc. Am. Acad. xix. 31. Palafoxia in part. Less., DC, Benth. «fe Hook. 



P. latif6lia, DC. Prodr. v. 125, of Southern Mexico, is unknown to us, and by its opposite 

 cordate leaves and obovate involucral bracts is probably of some other genus. 

 * Anomalous species, connecting with Pohjpteris. 



P. Peayi, Gray. A foot or two high, suffruticose at base, very leafy to near the summit, 

 minutely scabrous- leaves short (little over inch long), oblong or ovate-oblong and rounded 

 at both ends, or uppermo.st lanceolate and acutish, thickish, 3-nerved at base : heads corym- 

 bosely cymose, over half-mch liigh : involucre canipanulate, about half the length of the 

 flowers; its bracts spatulate-linear, at apex truncate-obtuse and somewhat purplish-sphace- 

 late : corollas with oblong lobes fully half the length of the cylindraceous throat : pappus 

 shorter than the corolla-tube and several times shorter than the glabrate akene, of 8 oblong 

 rigid pointless lacei'ately scarious-edged paleie (comparable with those of some outermost 

 flowers of the following). — Proc. Am. Acad. xii. 59, xix. 31. — Coast of S. Florida, in 

 sandy soil, Feay, Chapman, Curtiss, no. 1507. 



* * Genuine species, with narrow and paniculately scattered heads, narrowly linear involucral 

 bracts, these in age usually concave and applied to the sid^tended akenes. 



P. linearis, Lag. 1. c. Flowering as an annual, but becoming perennial and frutescent, 

 strigose-cinereous and partly hirsute or liispid, slender flowering brandies sometimes 

 glanduliferous : leaves linear, or lower ones lanceolate, more or less canescent : lieads aljout 

 inch long, 15-30-flowered (or by depauperation 10-12-flowered) ■ corolla-lobes oblong-linear, 

 half the length of the throat: jjappus of 4 (sometimes 5) linear hyaline palea with strong 

 and rigid excurrent costa, and little shorter than the slender akenes, or sometimes 2 to 4 

 additional and shorter blunt ones, or in the outer flowers all reduced, short, and of firmer 

 texture, with imperfect costa, or abortive. — DC. Prodr. v. 124; Hook. Bot. Mag. t. 2132. 

 Ageratiun lineare, Cav. Ic. iii. 3, t. 205. Paleolaria carnea, Cass. Bull. Philom. 1816, & Diet. 

 P. leucoph//lla, Gray, Proc. Am. Acad. viii. 291, & Bot. Calif, i. 388, a shrubby form with 

 reduced jjappus, from seeds of which were raised plants having nearly the ordinary pappus 

 of the species, which, although flowering as an herb with seemingly annual root along the 

 Mexican border, was originally described as shrubby. — On the Colorado near Fort Yuma, 

 &c., S. California, and Arizona. (Mex.) 



152. RIGIOPAPPUS, Gray. (From pi'yto?, stiffened, and 7ra7r7ro5, pap- 

 pus.) — Proc. Am. Acad. vi. 548, Bot. Calif, i. 387 ; Benth. & Hook. Gen. ii. 

 40G. — Single but variable species. 



R. leptocladus, Gray, 1. c. Slender annual, a span to a foot high, minutely hirsute-pubes- 

 cent to almost glabrous, paniculately or subcorymbosely l)ranched : In-anchcs conmiouly 

 filiform, elongated, and leafless below, smooth, simple or proliferous, bearing solitary heads: 

 leaves all alternate, very narrowly linear, sessile, erect, entire, those of the branches near the 

 heads small and subulate : involucre 3 lines high : flowers yellow but often changing to pur- 

 ple or whitish : palcK rather than awns of the pap])us from half to two-thirds the length of 

 the akene, 3 to 5, occasionally only 2 or 1, or rarely wanting. — Dry grijund, interior region 

 of Washington Terr, to the middle of California and Nevada ; first coll. by Lijull. 



