362 ORDER Lxvni. COMPOSITE. 



the scale imbricate. Receptacle alveolate. Corolla of the disk 

 deeply 5-cleft. Achenia hirsute or villous. Pappus setaceous, 

 in many series. Herbaceous plants, with alternate, entire leaves, 

 and fastigiate branches. 



1. G. hyssopifo'lia, (Nees.) Stein erect, glabrous, striate,"with fasti- 

 giate branches. Leaves linear-lanceolate, 3-nerved, acute, with scabrous 

 margins. Flowers in terminal fastigiate corymbs; involucre ovate, the 

 interior scales obtuse, the exterior acute, florets of the ray from 3 — 10. 

 — White, tinged with purple. If. Aug. — Oct. Common. Middle 

 Car. and Geo. 1 — 2 feet. 



Genus XV.— SERICOCAR'PUS. Nees. {Aster solidaginoides, Mich., 

 A. conyzoides, Willd., A. torti/olius, Mich.) 



(From serikos, silky, and karpos, fruit) 



Involucre obovate, oblong, with scales in several series, the 

 tips herbaceous and spreading. Receptacle alveolate. Aclienia 

 obpyramidal, short, densely silky. Pappus simple, rigid. Her- 

 baceous plants, with alternate sessile leaves, and corymbose 

 flowers and branches, and white flowers. 



1. S. solidagin'eus, (Nees.) Stem glabrous, slightly angled. Leaves 

 linear-lanceolate, sessile, entire, scabrous on the margin. Flowers sessile, 

 in small clusters on corymbose fastigiate branches; involucre cylindrical, 

 with obtuse reflexed scales. Seeds oblong, silky, pubescent, angled. — 

 White. U. July — September. Rich soils. Common. 



2. S. conyzoi'des, (Nees.) Stem simple, striate, slightly pubescent, 

 or somewhat rigid. Leaves sessile, the lower ones cuneate-lanceolate, 

 serrate, ciliate, and scabrous along the margins, upper ones entire, 

 lanceolate. Flowers in sessile clusters, on fastigiate corymbose branch- 

 es ; involucre cylindrical, with oblong ciliate scales ; ray florets some- 

 times 6, 2 — 3-cleft at the summit. Seeds villous; pappus scabrous. — 

 White, tinged with purple. 11. June — Aug. Middle upper dist. 

 Car. and Geo. 



3. S. tortifo'lius, (Nees.) Stem pubescent, branching toward the 

 summit. Leaves sessile, tortuous, obovate, acute or obtuse, entire, pu- 

 bescent. Flowers in sessile clusters, on fastigiate corymbose branches; 

 involucre cylindrical, with appressed linear-lanceolate scalds ; ray flo- 

 rets 2-cleft. Seeds oblong, pubescent. — White. 2£. Low country. 

 2 feet. 



Genus XVI.— AS'TER. L. 



(From aster, a star.) 



Involucre imbricate, with the lower scales generally expand- 

 ing, florets of the ray usually more than 10, never yellow ; 

 those of the disk hispid. Receptacle naked; pappus simple, 

 pilose. 



a. Leaves entire, florets of the ray generally numerous. Seeds silky, 

 pubescent. 

 1 A. flexuo'sus, (Mich.) Stem procumbent, assurgent, glabrous. 

 Leaves subulate, linear, sessile, 3-narved, somewhat fleshy, very long. 



