Pohjpteris. COMPOSITE. 337 



F. tripteris, DC. 1. c. Lowest leaves commonly ovate or oblong and entire ; others of 3 

 oval or oblong or the upper linear leaflets : tips of involucral bra.-t? and flowers usually dull 

 white : anther-tips acutish. — (jra\-, PL 'Wright, i. 121. — S. Texa.s ; first coll. by Derlandier. 

 (Adj. ilex.) 



150. POLYPTERIS, Xutt. (HoAvs, many, and in-cpts, meant for Trnpor, 

 wing ; many-winged or feathered, i. e. the pappus. ) — Soutln-astern X. American 

 herbs (entering ^Ie.\;ico). more or less &cubrous-])ubescent ; with undivided and 

 mo.-tly entire petiolate leaves, all or the upper alternate, and loosely corymbose- 

 cymose or paniculate and pedunculate heads of rose-purple or flesh-colored flowers, 

 in summer and autumn. — Gen. ii. 1.39 ; Ell. Sk. ii. 314 (not of DC, which was 

 a Gfnilrirrh'a) ; Xutt. Trans. Am. Phil. Soc. ser. 2, .377 ; Gray. Proc. Am. Acad. 

 xix. 30. Part of Pahifoj-la, Less., DC, &c. 



§ 1. Heads homogamous, middle-sized or small : bracts of the involucre her- 

 baceous up to the small sphacelate colored tip : corolla.s 5-parted nearly down to 

 tlie slender tube : akenes narrowly obpyramidal : root annual. (Nearest to Flo- 

 resiina.) 



■ P. Callosa, Ge.4t, 1. c. Slender, panienlately branched, a foot or two high : leave; linear, 

 slightly petioled : peduncles glandular: involucre turbinate, 10-12-flowered, quarter-inch 

 high, of s or 10 linear-oblong bracts : akenes minutely pubescent or glabrous : paleae of the 

 pappus all short, obovate or roundish, with costate-thicliened centre seldom reai'hing the 

 obtuse or erose and rctuie apex, occasionally minute or wholly wanting. — "iif-ria bullosa, 

 Xutt. Jour. Acad. Philad. ii. 121; Bart. Fl Am. Sept. t. 46. Flurestina callosa, DC. Prodr. 

 V. 6.55. Palafoxia callosa, Torr. & Gray, Fl. ii. 369. — Low or dry ground, Arkansas to 

 Texas ; first coll. by XMall. 



^P. Texana Gray, 1. c. Stouter ; leaves from lanceolate-linear to lanceolate-oblong (at 

 least below), distinctly petioled : peduncles less glandular : involucre campanulate or broader, 

 20-30-flowered, 3 to 5 lines high, of S to 12 spatulate-oblong bract- : palea; of the pappus 

 from oblong-ovate to oblong-lanceolate, with slender nearly complete or slightly excurrent 

 costa, sometimes almost as long as the akene, in the outer flowers often much shorter. — 

 Palafoxia Texana, DC. Prodr. v. 124; Torr. & Gray, Fl. 1. c. — Kiver-banks, Texas; first 

 coll. by Berlandier. (Adj. Slex.) 



§ 2. Heads heterogamons, larger, with palmately 3-lobed rays : di~k-corollas 

 parted not quite to the filiform tube : bracts of the involucre herbaceous up to 

 the small and narrow sphacelate colored tip : akenes slender : root annual. 

 P. Hookeriana, Gray, 1. c. Stouter. 1 to 4 feet high, above glandular-pubescent and 

 somewhat viscid: leaves from narrowly to broadly lanceolate, mostly 3-nerved below: invo- 

 lucre many-flowered, broad, halt-inch or more high, of 12 to 16 lanceolate bracts in two 

 series, the" outer looser and often whoUy herbaceous, inner with purplish tips: ray-flowers 

 s to 10, the deeplv 3<left rose-red rays half-inch long, but sometimes reduced or abortive: 

 pappas'iu the ray" a crown of 6 to 8 short and obtuse rather rigid spatulate pales; in the 

 disk of narrowh" lanceolate thin paleoe, traversed by an excurrent costa. attenuate at apex 

 into a slender point or short awn, nearly of the length of the akene. — .5>^-(a sphacelala 

 (Xutt). ToiT. in Ann. Lvc. X. Y. ii. 214. Palafoxia Tfxona. Hook. Ic. PI. t. 148, not DC. 

 P. Hooleriana, Torr. & Gray, Yl. ii. 368 ; Hook, f . Bot. Mag. t. 5.549, with var. subradiata, 

 a reduced state. — Sandy plains of Xebraska to Texas. (Adj. Ilex.) 



§ 3. Heads homogamous, rather large : corollas with the base of 5-parted limb 



forming a short-campanulate throat: involucre more imbricated and whitish- 



scarioul glabrous: akenes slender: root perennial. — Polypteris, Xutt. 



P. integrifolia, Xrrx. Xot glandular : stems 2 to 5 feet high, fastigiately corymbose at 



summit, almost glabrous : leaves scabrous, lanceolate and obtuse, upper ones linear, lowest 



spatulate-<jbloii:' to obovate: heads fully haU-inch high, many-flowered: principal bracts of 



22 



