202 COMPOSITiE. Aster. 



subulate: akenes oblong, 7-10-nerYed : pappus ratber rigid. — Fl. ii. 161 ; Cbapm. Fl. 205. — 

 Piue-barren swamps, W. Florida, Chapman, Curtisx. 

 " A. tBnuifoliuS, L. Stem simple or paniculately branched above, a foot or two high from 

 a weak and slender rootstock, often flexuous, somewhat sparsely leafy : leaves rather fleshy, 

 at least thickish, linear, tapering to both ends, acute ; tlie lower (2 or 3 lines wide) with long 

 tapering base ; upper subulate-attenuate : involucre turbinate ; its bracts lanceolate-subulate 

 and attenuately very acute : style-appendages linear-subulate : akenes narrow, 5-ribbed, his- 

 pidulous-pubescent : pappus soft. — Spec, ii. 873 (excl. syn. Pluk.) & herb. ; Gray, Proc. Am. 

 Acad. viii. 647. A. fh-xiiosus, Nutt. Gen. ii. 154; Torr. & Gray, 1. c. A. sparsijloi'us, Pursh, 

 Fl. ii. 547; Ell. Sk. ii. 346, not Jlichx. .1. Tripolium, AValt. Car. 154. — Salt or brackish 

 marshes, coast of jiass. to Florida. This is one of the plants of Clayton which by the char- 

 acter in Gronov. Fl. Virg. was referred by Linnajus to A. Unifolius. 



•i— -h- Heads ratlier small (quarter-inch high), with conspicuous violet or purple rays: little iin- 

 bricated involucre with peduncles and upper part of intern viscid-r/landular : wholly herbaceous, 

 western, might be sought among the Gbnididud of true Astt;r. 



~"A. pauciflorus, Nutt. Stem 6 to 20 inches high from a slender creeping rootstock, simple 

 and bearing few heads, or branching above and witli several corymbosely disposed short- 

 peduucled heads : lea^■cs moderately flesliy, linear, or radical subspatulate or elongated- 

 lanceolate, entire, uppermost reduced to short sparse bracts : bracts of short hemispherical 

 involucre rather fleshy and green, moderately une(jual and rather loose, in only 2 or 3 ranks: 

 style-appendages lanceolate-subulate : akenes narrow, compressed, striate-nerved, appressed- 

 pul]escent. — Gen. ii. 154, & Trans. Am. Phil. Soc. vii. 292; Torr. & Gray, Fh ii. 164. A. 

 ciiricifolius, HBK. Nov. Gen. & Spec. iv. 92, t. 333. Tripolium suhulatum, Nees, Ast. 167; 

 Lindl. in Hook. Fl. ii. 15, & DC Prodr. v. 254. T. caricifolium, Schauer in Linn. xix. 721, 

 — A\'et saline soil, Saskatchewan and Dakota to New Mexico, Utali, and Arizona. { Jlex.) 



Var. graoillimus, Geay, PL Wright, ii. 76, a very slender form, with leaves almost 

 filiform ; from New Mexico, Wricjht. 



-)— -1— •)— Heads small or rather small, with close imbricated involucre and who'e herbage smooth 

 and glabrou,s: branching plants witli lignescent base, or even shrubby, all uf the Southwestern 

 borders and Mexican, and in saline soil. 



++ Low and spreading or tufted, with merely lignescent base, leafy: rays purple or violet, rather 

 conspicuous, about 3 lines long. 



A. blepharoph:^llus, Gray. Loosely surculose-tufted, with ascending flowering stems a 

 span or two liigh : leaves fleshy, conspicuously hispid-ciliate with strong bristles ; those of 

 creeping sterile shoots and rosulate tufts linear-spatulate, half-inch long ; of the branching 

 flowering stems nmch smaller, short-linear, and upper ones reduced to minute and merely 

 bristle-tipped scales: he;uls 3 lines high : involucre turbinate; its bracts dry and pale, ovate- 

 oljlong to lanceolate, rather obtuse, carinate-one-nerved : rays 10 to 14: "stile-appendages 

 short-subulate: akenes obscurely striate-nerved, not compressed, sericeous. — PI. 'Wright, 

 ii. 77. — Las Playas Springs, New Mexico, Wright. 



A. riparius, HBK. A foot or two high from a somewhat lignescent base, diffusely branched ^ 

 branches terminated by solitary heads (of 4 or 5 lines in height and equally broad) : leaves 

 linear and entire, or \mxi_-<,t spatulate and incisely few-toothed, an inch or less long, on the 

 branches toward the heads gradually re.luced to small subulate bra.ts : involucre'shorter 

 than the disk; its numerous well-indiricated bracts narrowlv lanceolate and with subulate- 

 acuminate greenish tips: stjle-appeudag.'s subulate, rather sh.)rt : akenes pubescent ob- 

 scurely striate: pappus rufous. — Nov. (ien, & Spec, iv. 92, the rays said to be white which 

 IS probably a mistake, and tlie im olucre subsquarrose, but it is not so, though the outer mav 

 be a little loose. .1, Sonora. (iray, PI. M'right, ii. 76. -S. Arizona, west of the Chiricahui 

 Mountains, Wright. (Me^., lIiiinh<iUU.) 



■H- ++ Taller much branched, rigid, woody at base, with small heads terminating the branchlets: 

 rays small (a line or two long) and ivliite or none: anomalous species. 

 A. carnosus Gray. Glaucescmt or pale, 2 or 3 feet high ; the rigid slender stems diffusely 

 and at length intricately much l,ranched : lower leaies linear and vers- flc'sli,- an inch or 

 less long; upper and those of the branchlets induced to small or minute subulate scales: 

 heads 3 or 4 hues high : involucre campanulate or turbinate, of lanceolate acute chartaceous 

 bracts: rays muduig: style-appendages linear-subulate: akenes sericeous-pubescent. - L/«o- 



