;S2 



COMPOSITAE. 



[Vol. III. 



70. Aster tenuifolius L,. Perennial Salt-marsh Aster. (Fig. 3804.) 



A sler ten ni/olius L. Sp. PI. S73. 1753. 

 Aster Jlexuosus Nutt. Gen. 2: 154. 1S1S. 



Perennial, glabrous and fleshy; stem flexuous, 

 striate, at least when dry, sparingly and loosely 

 branched, i-2 high. Stem leaves linear, en- 

 tire, acute, sessile or partly clasping at the base, 

 the lowest lanceolate-linear, z'-f>' long, 2 // -3 // 

 wide, those of the branches minute, bract-like, 

 appressed; heads rather few, 6 // -i2 // broad, 

 terminating the branches; involucre turbinate, 

 about A," high, its bracts lanceolate, acuminate 

 or mucronate, glabrous, green on the back or 

 tip, appressed, imbricated in about 5 series, the 

 outer shorter; rays numerous, longer than the 

 pappus, pale purple or nearly white; pappus 

 tawny; achenes hispid-pubescent, 5-nerved. 



In salt marshes, coast of Massachusetts to Flor- 

 ida. Aug. -Oct. 



71. Aster exilis Ell. Slim Aster. 

 (Fig. 3805.) 



Aster exilis Ell. Bot. S. C. & Ga. 2: 344. 

 Aster divaricatus T. & G. Fl. N. A. 2: 163 



1824. 

 1841. 



Not E 1753- 



Annual, glabrous, fleshy; stem slender, usually much 

 branched, the branches usually divergent. Leaves linear 

 to linear-lanceolate, I'-tf long, \"-2%" wide, entire, 

 sessile, acute or acuminate, or the lowest narrowly ob- 

 long, 3 // -4 // wide and petioled, those of the branches 

 subulate; heads numerous, panicled, about 5" broad; in- 

 volucre campanulate, about 3" high, its bracts linear- 

 subulate, appressed, imbricated in 3 or 4 series; rays pur- 

 plish, about 2" long, mostly fewer than the disk-flowers, 

 longer than the pappus; achenes somewhat pubescent. 



In moist or wet soil, especially in saline situations, Kansas 

 to Texas, South Carolina and Florida. Aug.-Oct. 



72. Aster subulatus Michx. Annual Salt-marsh Aster. (Fig. 3806.) 



1803. 

 1841. 



Aster subulatus Michx. Fl. Bor. Am. 2: in. 

 Aster linifolius T. & G. Fl. N. A. 2: 162. 

 Not L. 1753- 



Annual, glabrous and fleshy ; stem paniculately 

 branched, flexuous above, i-6 high, slightly 

 angled, sometimes i / in diameter at the base, 

 but usually smaller. Stem-leaves linear-lanceo- 

 late, acute, entire, sessile by a broad or slightly 

 clasping base, 2 / -io / long, i // -8 // wide, those of 

 the branches very small and subulate; heads 

 numerous, 3 // ~5 // broad; involucre campanulate, 

 or at length hemispheric, 1"-$" high, its bracts 

 linear-subulate, green, imbricated in 3 or 4 series, 

 the outer shorter; rays 20-30, purplish, scarcely 

 exceeding the nearly white pappus, more numer- 

 ous than the disk-flowers; achenes compressed, 

 minutely pubescent. 



In salt marshes, coast of New Hampshire to 

 Florida. Aug.-Nov. 



