ORDER 70. ASTERWORTS. 283 



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



c Heads quite large, raya narrow, about 30. Tall. c. Elecampane. IN'TJLA. 

 rt Pappus scaly, very short. Eoot Ivs. cordate. Rays 4 or 5. S. BRACHYCH^E'TA. 

 d Pappus abundant bristly hairs. Root Ivs. not cordate. Goldenrod. SOLIDA'GO. 1 

 d Pap. of a single row of equal bristly hairs. Ped. long, slender. S. ISOPAP'PCS. 

 e Involucre about 4-rowed. Rays 20-30. Head solitary. S. BALDWIX'IA. 

 e Invo.r.cre about 2-rowed. Rays 8-10. Heads corymbed. S. ACTIXOSPER'MCM. 

 i Ray florets pistillate. Leaves decurrent. Sntezewort. HELK'NIUM. 



f Kaj florets neutral. False Sneezewort. LEPTOP'ODA. 



g Fruit (achenia) 4-angled. Heads large, showy. Cone-flower. RUUBECK'IA. 

 g Fruit flattened, winged. Heads showy. Rays droop. W. S. LEP'ACHTS. 

 Jj Achenia wingless. Pappus of 2 deciduous scales. Sunflower. HELIAN'THCS. 2 

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



Rag- Sunflower. ACTINOM'ERISJ. 

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



M. W. Leaf-cup. SIL'PHIUM. 

 k Ach. winged, in only 1 row. Small, with middling hds. S. BERLANDIK'RA. 



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



m Stemless plants, leaves radical, appearing after heads. Coifs-foot. TUSSILA'GO. 



n Scales 5, united in 1 row. Leaves pinnate. French MnrigoU. TAGE'TES. 



n Seal, in 2 rows, the out. united. Lvs. pinn. \V. S. False Dug fennel. DYSO'DIA. 



n Scales in 1 or 2 rows, all distinct. W. S. Arnica. AR'NICA. 



o Involucre imbricated in 3 or more rows of scales. Sunflower. HELIAN'THCS. 2 



o Invol. 2-rowed. Pappus of downwardly hispid awns. Burr Marigold. BI'DENS. 3 



o Invol. 2-rowed. Pappus upwardly hispid if at all. Tick Sunflower. COREOP'SIS. 4 



p Achenia wingless. Rays 5-12. Herbs viscid, 2-10f. high. S. POLYM'NIA. 



p Achenia wingless. Rays 5. Herbs 2-10' high, at first stemless. Flowers 



early in Spring. W. S. CHRYSOG'ONUV. 



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



Resin Wted, Polar Plant. SIL'PHIUM. 



q Herbs 3-6f. high. Rays 1-5. Recept. flat. S.-W. Crown Beard. VERBESI'NA. 



q Herbs 2-3f. high. Rays 6-9. Receptacle convex. S.-W. TETRAGONOTHE'CA. 



q Herbs 2-6f. high. Rays 10-15. Recept. conical. False Sun/lower. HELIOP'SIS. 



q Shrubs 3-10f. high, with solitary heads. S. ^ BORRICH'IA. 



r Ach. very silky, biggest at top. Rays about 5. False Aster. SEHicorAR'pus. 



r Achenia smooth or smoothish, flattened. Rays 6-100. Starwort. ASTER. 



Wild plants l-4f. high, with middle-sized heads (about 1'broad). DIPLOPAP'PUS. 



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



t Herbs 2-8f. high, very smooth. Leaves lanceolate, entire. W. BOLIO'NIA. 



t Heibs i-9f. high, hairy or rough. Rays 20-200. White-weed. ERIG ERO.N. 



n Involucre bread and flattish. Pappus 0. Rays white. Ox-eye. LEUCAN'THEMUM. 



u Involucre hemispherical. Pappus a membranous margin. Cult. PYRE'THKUM. 



u Involucre hemispherical. Pappus 0. Lvs. lobed. Cultivated. CHRYSAN'THEMOM. 



u Inv. bell-shaped. Pappus 0. Lvs. entire. Rays violet-purp. W. f Laisy. BEI/LJS. 



