222 THE FLORA. 



c Heads small, rays few (2-15) d 



= Heads quite large, rays narrow, atout 80. Tall. u. Elecamj)ani. In'dla. 

 d Pappus scaly, very short. Eoot Ivs. cordate. Eays 4 or 5. S. BRAOHTCHie'TA. 

 d Pappus abundant bristly hairs. Eoot Ivs. not cordate. Goldenrod. Souda'go. 1 

 d Pap. of a single row of equal bristly hairs. Fed. long, slender. S. Isopap'pds. 

 e Involucre about 4-rowed. Eays 20-3*. Head solitary. S. Baldwiu'ia. 

 e Involucre about 2-rowed. Eays 8-10. Heads corymbed. S. Aotinosfee'mum, 

 f Eay florets pistillate. Leaves deourrent. Sneezewort. Hele'nidm. 



f Eay florets neutral. False Sneezewort. Lbptop'oda. 



g Fruit (achenia) i-angled. ■ Heads large, showy. Oone-flower. Eudbeok'ia. 

 g Fruit flattened, winged. Heads showy. Eays droop, W. S. Lep'achys. 

 h Achenia wingless. Pappus of 2 deciduous scales. Sunflower. Helian'thus. 2 

 h Achenia winged. Pappus of 2 persistent awns. Lvs. often deourrent. W. 



Rag-Sunfl,ower. Actinom'ebis. 

 k Achenia wingless, in more than 1 row. Coarse herbs with large heads. 



M. W. Leaf-eup. Sil'phium. 

 k Aoh. winged, in only 1 row. Small, with middling hds. S. Bbblahdie'ba. 



m Stems leafy, erect, about 2f. (or l-3f.) high n 



m Stemless plants, leaves radical, appearing after heads. Oolfis-foot. Tcssila'so. 

 n Scales 5, united in 1 row. Leaves pinnate. French Marigold. Tage'tes. 

 xi Seal, in 2 rows, the out. united. Lvs. pinn. W. S. False Dog-fennel. D yso'dia. 

 II Scales in 1 or 2 rows, all distinct. W. S. Arnica. Ae'nioa. 



o Involucre imbricated in 8 or more rows of scales. Sunflmiier. Helian'thds. 2 



o Invol. 2-rowed. Pappus of downwardly hispid awns. Burr Marigold. Bi'dehs. 3 

 c Invol. 2-rowed. Pappus upwardly hispid if at all. ' Tick Sunflower. Coeeop'sis. 4 

 p Achenia wingless. Eays 5-12. Herbs viscid, 2-lOf. high. S. Poltm'nia. 

 p Achenia wingless. Eays 5. Herbs 2-10' high, at flrst stemless. Flowers 



early in Spring. W. S. Chetsoo'onum. 



p Achenia broadly winged. Eays 12-25. Coarse, tall herbs. M. S. W. 



Besin Weed, Polar Plant. SiVphidm. 



q Herbs 3-6f. high. Eays 1-5. Eeoept. flat. S.-W. Grown Beard. Veebesi'ha. 



q Herbs 2-8f. high. Eays 6-9. Eeoeptacle convex. S.-W. Tetragonothe'oa. 



q Herbs 2-6f. high. Eays 10-15. Eeoept. conical. False Sunflower. Heliop'sis. 



q Shrubs 3-lOf. high, with solitary heads. S. Boerioh'ia. 



r Ach. very silky, biggest at top. Eays about 5. False Aster. SEEioocAa'pua. 



r Achenia smooth or smoothish, flattened. Eays 6-100. Starwort. Astee. 5 



s Wild plants l-4f. high, with middle-sized heads (about I'broad). Diplopap'pbs. 



s Garden plants l-2f. high, with very large heads. China Aster. Callis'tephus. 



t Herbs 2-3f. high, very smooth. Leaves lanceolate, entire. W. Bolto'nia. 



t Herbs J^9f. high, hairy or rough. Eays 20-200. White-weed. Ejig'eron. 6 



u Involucre broad and flattish. Pappus 0. Eays white. Ox-eye. Leuoan'themom. 



u Involucre hemispherical. Pappus a membranous margin. Cult. Ptkk'thi'.um. 



u Involucre hemispherical. Pappus 0. Lvs. lobed. Cultivated. CnKTSAN'TUEMUM. 



u Inv. bell-shaped. Pappus 0. Lvs. entire. Eays violot-purp. W. f Ziaisy. Bel'lis. 



