222 THE FLORA. 
c Heads small, rays few (2-15)....d 
= Heads qnite large, rays narrow, abont 80, Tall. ¢.  ZBlecampane. In’vua. 
d Pappus scaly, very short. Root lvs. cordate.. Rays 4 or 5. 8. Bracnycna#’ra. 
a Pappus abundant bristly hairs. Root lvs. not cordate. Goldenrod. Soutpa’eo. 
d Pap. of a single row of equal bristly hairs. Ped. long, slender. S. Isopap’pus. 
e Involucre about 4-rowed. Rays 20-30. Head solitary. S.  Batpwin’1a. 
e Involuere about 2-rowed. Rays 8-10. Heads corymbed. S. ActrnosPER’/MUM. 
f Ray florets pistillate. Leaves decurrent. Sneezewort. HeLE/NIUM. 
f Ray florets neutral. False Sneezewort. Lurtor’opa. 
g Fruit (achenia) 4-angled. Heads large, showy. Cone-jlower. RupBeox’1a. 
g Fruit flattened, winged. Headsshowy. Rays droop. W.S. Lep’acuys. 
h Achenia wingless. Pappus of 2 deciduous scales. Sunflower, HELian/THUS. 
h Achenia winged. Pappus of 2 persistent awns. Lvs. often decurrent. W. 
Rag-Sunflower, AcTINOM’ERIS. 
k Achenia wingless, in more than l row. Coarse herbs with large heads. 
M. W. Leaf-cup. S1v/Parum. 
k Ach. winged, in only 1 row. Small, with middling hds. 8. Bertanpin’/Ra. 
m Stems leafy, erect, about 2f. (or 1-8f.) high....n 
m Stemless plants, leaves radical, appearing after heads. Cold’s-foot. Tusstia’co. 
u Scales 5, united in l row. Leaves pinnate. French Marigold. Taen’res. 
nu Scal. in 2 rows, the out. united. Lvs. pinn. W.S. False Dog-fennel. Dyso’p1a. 
u Scales in 1 or 2 rows, all distinct. W.S. Arnica. AR/NICA. 
o Involucre imbricated in 83 or more rows of scales. Sunflower. HEevian’rHvs. 
= Invol. 2-rowed. Pappus of downwardly hispid awns. Burr Marigold. Br’pens. 
o Invol. 2-rowed. Pappus upwardly hispid ifat all. Zick Sunflower. Corzor’sis. 
p Achenia wingless. Rays 5-12. Herbs viscid, 2-10f. high. 8. Poxnym/nra. 
p Achenia wingless. Rays 5. Herbs 2-10’ high, at first stemless. Flowers 
early in Spring. W. 8. CHRYs0@/oNUM, 
p Achenia broadly winged. Rays 12-25. Coarse, tall herbs. M.S. W. 
Resin Weed, Polar Plant. S1’puium. 
qa Herbs 8-6f. high. Rays 1-5. Recept. flat. S.-W. Crown Beard. Verwesi’/na. 
q Herbs 2-3f. high. Rays 6-9. Receptacle convex. S.-W. Txrraconorue’ca. 
qa Herbs 2-6f. high. Rays 10-15. Recept. conical. False Sunflower. Huxrop’sts. 
q Shrubs 3-10f. high, with solitary heads. 8, Borricw’ta, 
r Ach. very silky, biggest at top. Rays about 5. False Aster. Sericocar’pus. 
r Achenia smooth or smoothish, flattened. Rays 6-100.  Starwort. AsTER. 
s Wild plants 1-4f. high, with middle-sized heads (about 1’ broad). Diptopar’Pus, 
s Garden plants 1-2f. high, with very large heads. China Aster. CaLLis/TEPHUS. 
t Herbs 2-8f. high, very smooth. Leaves lanceolate, entire. W. Botro’nia. 
t Herbs 4-9f. high, hairy or rough. Rays 20-200. White-weed. Enie’Exon. 
u Involucre broad and flattish. Pappus 0. Rays white. Ox-eye. Lrvcan/THEMUM. 
u Involucre hemispherical. Pappus 2 membranous margin. Cult. Pyre/rarum. 
«a Involucre hemispherical. Pappus 0. Lvs. lobed. Cultivated. Curysan’rHEmuM. 
« Inv. bell-shaped. Pappus 0. Lvs. entire. Rays violet-purp. W. + Daisy. Bex’. 
Bm © bo 
