202 COMPOSITE. Aster. 



subulate : akenes oblong, T-lO-uerved : pappus rather rigid. — Fl. ii. 161 ; Clmpm. Fl. 205. — 

 Piue-barren swamjjs, W. Florida, Chapman, Curtiss. 

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

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

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

 taperin"' 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. flexuosus, Nutt. Gen. ii. 154; Torr. & Gray, 1. c. A. sparsijiorus, Pursh, 

 Fl. ii. 547 ; Ell. Sk. ii. 346, not Michx. A. TripoUum, Walt. Car. 154. — Salt or brackish 

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

 acter in Grouov. Fl. Virg. was referred by Liunajus to A. linifolius. 



^_ ^— Heads rather small (quarter-inch high), with conspicuous violet or purple rays: little im- 

 .bricated involucre with peduncles and upper part of ftem viscid-ijlandular : wholly herbaceous, 

 western, might be sought among the Glandulusi of true Aster. 

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

 and l)earing few heads, or branching above and with several corymbosely disposed short- 

 peduncled heads : leaves moderately fleshy, linear, or radical subspatulate or elongated- 

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

 involucre rather fleshy and green, moderately unetpial and rather loose, in only 2 or 3 ranks : 

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

 pubescent. — Gen. ii. 154, & Trans. Am. Phil. Soc. vii. 292; Torr. & Gray, Fl. ii. 164. A. 

 can'cifolius, HBK. Nov. Gen. & Spec. iv. 92, t. 333. TripoUum subulatum, Nees, Ast. 167 ; 

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

 — Wet saline soil, Saskatchewan and Dakota to New Mexico, Utah, and Arizona. (Mex.) 



Var. gracillimus, Gr.vy, PI. Wright, ii. 76, a very slender form, with leaves almost 

 filiform ; from New Mexico, Wrijlit. 



^_ ^^ ^— Heads small or rather small, with close imbricated involucre and who'e herbage smooth 

 and glabrous: branching plants Avith lignescent base, or even shrubby, all of 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 . blepharophyllus, Gray. Loosely surculose-tufted, with ascending flowering stems a 

 span or two liigii : 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 much smaller, short-linear, and upper ones reduced to minute and merely 

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

 oblong to lanceolate, rather obtuse, carinate-one-nerved : rays 10 to 14: style-appendages 

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

 ii. 77. — Las Playas Springs, New Mexico, Wri(jht. 

 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 lowest spatulate and incisely few-toothed, an inch or less long, on the 

 branches toward the heads gradually reduced to small su1)ulate bracts : involucre shorter 

 than the disk; its numerous well-imbricated bracts narrowly lanceolate and with subulate- 

 acuminate greenish tips : style-appendages subulate, rather short : akenes pubescent, ol> 

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

 is probably a mistake, and tiie involucre subsquarrose, but it is not so, though tlie outer may 

 be a little loose. A. Sonorce, Gray, Pk Wright, ii. 76. — S. Arizona, west of the Chiricahui 

 Mountains, Wright. (Mex., Humboldt.) 



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

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

 A. carnosus, Gr.\y. Glaucescent or pale, 2 or 3 feet high ; the rigid slender stems diffusely 

 and at length intricately much branched : lower leaves linear and very fleshy, an inch or 

 less long; upper and tliose of the branchlets reduced to small or minute subulate scales: 

 lieads 3 or 4 lines high : involucre campanulate or turbinate, of lanceolate acute cliartaceous 

 bracts : r-aijs wuntiiuj : style-appeudages linear-subulate : akenes sericeous-pul)escent. — Lino- 



