202 COMPOSITE. Aster. 



subulate : akenes oblong, 7-10-nerved : pappus rather rigid. Fl. ii. 161 ; Chapm. Fl. 205. 

 Pine-barren swamps, W . Florida, Chapman, Curtix*. 



A. tenuifolius, 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 ; the lower (2 or 3 lines wide) with long 

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

 and attenuate!}' very acute : style-appendages linear-subulate : akenes narrow, 5-ribbed, his- 

 pidulous-pubesceiit : pappus soft. Spec. ii. 873 (excl. syn. Pluk.) & her!). ; Gray, Proc. Am. 

 A cad. viii. 647. A. j!< .nuix/is, Nutt. Gen. ii. 154; Torr. & Gray, 1. c. A. sjHtrsijltirtis, Pursli, 

 Fl. ii. 547; Ell. Sk. ii. 346, not Michx. A. Trijiolitun, Walt. Car. 210. Salt or brackish 

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

 acter iu Gronov. Fl. Virg. was referred by Linnaeus to A linifolius. 



.)__ _j__ Heads rather small (quarter-inch high), with conspicuous violet or purple rays: little im- 

 bricated involucre with peduncles and upper part of stem viscid-glandular: wholly herbaceous, 

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



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

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

 pednucled 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 unequal 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. 

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

 Liudl. in Hook. Fl. ii. 15, & DC Prodr. v. 254. T. cari'-ijuliinn, Schauer in Linn. xix. 721. 

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



Var. gracillimus, GRAY, PL Wright, ii. 76, a very slender form, with leaves almost 

 filiform ; from New Mexico, Wright. 



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

 and glabrous: branching plants with lignescent base, or even shrubby, all of the Southwestern 

 borders and Mexican, and in saline soil. 



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

 conspicuous, about 3 lines long. 



A. blepharopliyllus, GRAY. Loosely surculose-tufted, with ascending flowering stems a 

 span or two high : 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 vipper ones reduced to minute and merely 

 hristli'-tipped scales : heads 3 lines high : involucre turbinate ; its bracts dry and pale, ovate- 

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

 short-subulate: akenes obscurely striate-nerved, not compressed, sericeous. PL 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 lowest spatulate and iucisely few-toothed, an inch or less long, on the 

 branches toward the heads gradually reduced to small subulate 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, ob- 

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

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

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

 Mountains, Wright. (Mex., Humboldt.) 



H- -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, GRAY. 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 those of the branchlets reduced to small or minute subulate scales : 

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

 bracts : rajs wanting : style-appendages linear-subulate : akenes sericeous-pubescent. Lino- 



