ORDER LXVIII. COMPOSITE. 397 



Sub-tribe IV.-^HELENIE'J3. 



Capitula usually heterogamous and radiate, with the rays in 

 one series ; flowers of the disk perfect. Anthers usually black- 

 ish. Pappus chaffy, rarely none. Leaves mostly alternate, 

 rarely opposite. 



Genus LIX— GAILLAR'DIA. Fou. 

 (In honor of Mr. Gaillard.) 



Involucre many-leaved. Leaves in two series, with a foliace- 

 ous appendix. Receptacle convex, hairy ; ray florets neutral, 

 3-parted ; disk florets perfect. Pappus chaffy, awned. Seeds 

 oblong, villous. 



1. G. lanceola'ta, (Mich.) Stem erect, pubescent, slightly branched. 

 Leaves alternate, linear-lanceolate, sessile, with a few serratures, ciliate. 

 Flowers solitary, terminal ; florets of the ray dilated at the summit, 8- 

 cleft ; pappus 8 or 9 leaved ; leaves terminated by a long awn. — Yel- 

 lowish or purple. 2£. May — Aug. Middle Geo. Pine-barrens. 1 — 

 2 feet. 



2. G. pulchel'la, (Fou.) Stem branching, hirsute. Leaves lanceo- 

 late ; the lower ones petioled, toothed ; the upper entire, acuminate ; 

 involucre very hirsute ; corolla of the disk with subulate teeth ; chaff 

 of the pappus with long awns. — Lou. 



Genus LX.— POLYP'TERIS, Nutt., oe PALAFOX'IA, Laga. 

 (From polus, many, and pteron, a wing.) 



Involucre many-leaved, oblong, membranaceous; florets all 

 perfect, tubular. Seed quadrangular. Pappus chaffy. 



1. P. integriko'lia, (Nutt.) Stem erect, slightly scabrous, branching 

 toward the summit. Leaves alternate, linear-lanceolate, entire ; invo- 

 lucre 8 — 12-leaved ; florets numerous, with a 5-cleft border. Seed some- 

 what scabrous, tapering at the base ; pappus consisting of 9 membrana- 

 ceous scales. — Southern Geo. 3 — 4 feet. 



Genus LXL— HYMENOPAP'PUS. L'Her. 

 (From hitmen, a membrane, and pappus, a pappus.) 



Involucre many-leaved. Leaves obovate, nearly round, col- 

 ored, expanding. Seed conical, somewhat pubescent. Pappus 

 chaffy, consisting of short, obtuse, denticulate scales. Recepta- 

 cle naked. 



1. H. scabiosje'us, (L'Her.) Stem erect, angular, woolly, tomentose. 

 Leaves alternate, long, pinnatifid, with remote segments, linear, den- 

 tate ; the upper ones with entire segments, all tomentose beneath. 

 Flowers in terminal corymbs ; involucre tomentose, the interior leaves 

 large, colored ; florets all perfect, tubular. — White. If. April — May. 

 Near Macon. 2 — 3 feet. 



