COMPOSITE. (COMPOSITE FAMILY.) 213 



flowered involucre linear, obtuse ; rays 5 - 7 ; achenia minutely pubescent. 

 (S. elliptical Ell.) Damp soil near the coast, Georgia to North Carolina. 

 Sept. Stem 3 - 6 high. Leaves very numerous, 2' - 3' long. 



30. S. pilosa, Walt. Stem hirsute, simple, or branching above ; leaves 

 very numerous, oblong-lanceolate, slightly serrate, mucronate, rough above, pu- 

 bescent on the veins beneath ; racemes numerous, slender, forming a pyramidal 

 or somewhat corymbose panicle; heads narrow, 12-15-flowered ; rays 7-10, 

 small ; scales of the involucre linear ; achenia slightly pubescent. (S. pyrami- 

 data, Pursh. S. villosa, Ell.) Low ground, Florida, and northward. Sept. 

 and Oct. Stem 2 - 8 high. Leaves 2' - 3' long. 



31. S. odora, Ait. Stem mostly simple, pubescent in lines ; leaves entire, 

 vaiying from linear-lanceolate to oblong-ovate, smooth on both surfaces, rough 

 on the margins, punctate with pellucid dots, often reflexed ; panicle pyramidal, 

 mostly one-sided ; heads 5 - 7-flowered ; rays about 3, showy ; achenia hairy. 

 (S. retrorsa, Michx.) Dry soil, Florida and northward. Oct. Stem 2- 3 

 high. Leaves 1 ' - 2 ; long. Plant anise-scented. 



32. S. tortifolia, Ell. Stem straight, simple or branched, rough-pubescent 

 above ; leaves small, linear, entire, or the lowest slightly serrate, often twisted, 

 pubescent on the margins and midrib ; panicle dense, pyramidal ; heads small, 

 6 - 9-flowered ; rays 3 - 4 ; scales of the involucre linear, obtuse ; achenia slightly 

 pubescent. Dry sandy soil, Florida to North Carolina. Sept. Stem 2 -3 

 high. Leaves very numerous, 1 ' - 2' long. 



33. S. brachyphylla, Chapm. Stem slender, pubescent, sparingly 

 branched ; leaves smooth or pubescent on the veins, finely serrate, the lowest 

 spatulate, the upper oval or orbicular ; racemes short, forming a compound ra- 

 ceme toward the end of the spreading branches ; scales of the 3 - 5-flowered 

 involucre rigid, obtuse ; rays none ; achenia pubescent, as long as the rigid 

 pappus. Dry light soil, Georgia, Florida, and westward. Sept. Stem 2 - 3 

 high. Leaves 1'- 2' long. 



- -i Lowest leaves cordate, on long petioles : heads in simple or compound ra- 

 cemes, 8 - IQ-Jlowered : pappus rigid, equalling or shorter than the hairy achenia. 



34. S. amplexicaulis, Torr. & Gray. Pubescent and roughish ; stem, 

 slender, sparingly branched above ; leaves sharply serrate, acute, the lowest 

 broadly cordate ; those of the stem ovate, abruptly contracted into a broadly 

 winged and clasping petiole, the uppermost small, sessile, and entire ; racemes 

 slender, often simple; rays 1-3; pappus as long as the achenium. Dry- 

 open woods, West Florida, and westward. Oct. Stem 2 - 3 high. 



35. S. COrdata, Short. Pubescent; stem sparingly branched above; leaves 

 acute, on wingless petioles ; the lowest large, coarsely serrate, cordate, the others 

 ovate, sharply serrate, on short petioles ; the uppermost entire, sessile ; racemes 

 compound, terminating the spreading branches, composed of crowded cluster- 

 like racemes ; the lower ones scattered; scales of the 8-10-flowered involucre 

 rigid, obtuse ; rays 5-6; pappus much shorter than the achenium. (Brachy- 

 chaeta, Torr. fr Gray.) Mountains of Georgia and North Carolina, and north- 

 ward. Sept. Stem 2 - 3 high. Lowest leaves 3' - 5' wide. 



