coMPOSiT.f:. 192 



§ § § Leaves entire (the lowest rarely subserrate), t cauline ones amplexicaul. 

 * * Heads paniculate. 



22. A. PHLOGIFO'LIUS. Muh. A. amplexicaulis. WiUd. 

 Stem simple, paniculate above, pubescent; leaves lanceolate, cordate, clasp- 

 ing the stem, acuminate, scabrous on the margin, pubescent; puKic/e loose, 

 few-flowered ; scales imbricate, lanceolate, lax, the points herbaceous. A fine 

 species with large violet-colored flowers. Grows in moist grounds, N. Y. 

 Stem 2 — 3 feet high, slender, branching above into a loose, terminal panicle. 

 Heads solitary, on the ends of the leafy branchlets. Rays 20 — 30. Scales 

 rather numerous. Leaves large (3 — 4 inclies long) on the stem, becoming 

 ismall and bracteate on the branches. Aug. — Nov. Fla rnc-cul or cd Aster. 



ji. patens (A. patens, j3t^) ; leaves auriculale-cordate, amplexicaul at base. 



23. A. L^VIS. L. A. mutabilis. L. A. amplexicaulis. Muh. 

 Very smooth; stem angular; branches simple, 1-flowered; leaves subam- 



plexicaul, remote, oblong, entire, shining, radical ones subserrate; involucre 

 closely imbricate, the scales broadly linear, rigid, thickened and herbaceous 

 at the apex. A very smooth and beautiful species, 2 — 3 feet high, growing in 

 low grounds. Stem polished, green, often somewhat glaucous. Leaves 

 rather fleshy, broadest at base, the lower ones tapering to a winged petiole. 

 Flowers large and showy, with numerous rays of a fine blue, becoming 

 purple. Sept.— Nov. Smooth Aster. 



/3. cijaneus (T. ^ G. A. cyaneus. P); stem and leaves conspicuously 

 glaucous. This variety is perhaps the most beautiful of all the Asters. 



y. lecigatus {T. S^ G. A. levigatus. Willd); leaves long, Imear-lanceolate. 



These beautiful varieties, heretofore exalted by most writers into species, 

 are here exhibited in accordance with the views of Drs. Torrey and Gray, and 

 undoubtedly in their true relationship. 



24. A. c.\'rneus. 



Sniooth; leaves uniform, narrow-lanceolate, entire, sessile, the lower ones 

 tapering to the base, upper, stem clasping; stem dividing into straight, 

 racemose, leafy, branches bearing middle sized heads with pale-purple rays. 

 Sept. Oct. Flesh-colored .is'ter. 



25. A. LAXUS. 



Stem loosely corjmbose-panicled above ; /enrfs linear-lanceolate, acuminate, 

 rough-edged, lower ones subserrate, those of the stem subreflexed, of the 

 branches much spreading; involucre imbricate, scales lanceolate, acute, re- 

 flexed at the apex. Fields. Stern 2 — 3 feet high with small, bluish flowers. 

 Sept. Oct. Loose-stalked Aster. 



26. A. PR.EA'LTUS. Pair. A. salicifolius. Ait. 

 Stem corymboselypaniculate, with hairy lines above ; leeives lanceolate, 



closely sessile or subamplexicaul, smooth and shining above, with a rough 

 margin, subserrate or entire, acute, the lower ones narrowed towards the 

 base ; involucre loosely imbricated with acute, green-tipped linear scales. 

 Common in moist woods and by streams, varying from 2 to 3 feet in hight. 

 The stem is slender, often flexuous, greener ol'ten purple, dividing above into 

 flowering branches, arranged in a sort of corymbose panicle of large and 

 showy blue flowers. Aug. Oct. 



27. A. amethvsti'nus. jVutt. 



Hirsute ; stein racemose-paniculate ; leaves linear-lanceolate, entire, rougli, 

 acute, with somewhat auriciilale appendages at the clasping base; involucre 

 of equal scales. Heads small, with azure rays. Aug. — Oct. 



