234 THE FLORA. 



V Disk florets yellow, perfect. Eays pistillate. Camomile. Anthem'is. 



V Disk florets yellow, perfect. Eiiys neutral. May-meed. Maru'ta. 



V Disk florets white, perfect. Rays pistillate. Yarrow. Achil'lea. 

 w Rays short, white, 3 or 4. W. S. Groivn-beard. Verbesi'na. 

 w Rays very short, white, 5, ear-shaped. W. M. Parthe^nium. 

 w Rajs very lar^e, purple, pendulous. Purple Cone-flower. Echina'cea. 



X Leaves pinnately divided. Inner involucre of 8 united scales, f Dah'lia. 



X Leaves simple. Receptacle conical with large chaff, f Zin'nia. 



X Leaves simple. Receptacle flat. Rays rose-color. Tick-seed. Coreop'sis. 



X Leaves simple. Receptacle flat. Rays white, short. W. Eclip'ta. 



)• Heads in corymbs. Disk florets regularly 5-toothed. r. Nardos'mia. 



y Heads solitary. Disk florets regularly 5-toothed. S, Dauy. Bel'lis. 



y Hds. solitary. Disk flts. 2-lipped, outer iip 8-toothed, inner 2. S. Chapta'lia. 



Sub-order Second, LIGULIFLOR^, 

 having all the florets ligulate (§06) and perfect, i. e., the heads radiant. 



2 Flowers bright yellow 3 



2 Flowers cream-color or purplish 5 



2 Flowers blue. Stems leafy, erect e 



3 Pappus none. Involucre of about 8 equal scales. .. .a 



3 Pappus double, the outer of scales, inner of bristles b 



3 Pappus wholly of feathery bristles f 



3 Pappus wholly of hair-like bristles, generally abundant 4 



4 Fruit bearing the pappus on its slender beak c 



4 Fruit not lengthened into a beak, pappus sessile d 



5 Pappus consisting of equal, feather-like bristles f 



5 Pappus of simple, hair-like bristles, abundant g 



a Leaves all alternate. Heads pauicled. r. Kippleivort. Lampsa'na. 



a Leaves partly opposite. Heads solitary or umbeled. Pappus 0. S. Apo'oon. 



b Leaves all radical, pinnatifld-toothed. Pappus scales 5, with 



5 bristles, c. Dwarf Dandelion. Krig^ia. 



b Lvs. all or mostly rad., seldom pinn. Pap. seal, and bribt. many. Ctn'thia. 

 c Stemless leaves runcinate. Pappus white. Dandelion. Tarax''acum:. 



o Stems leafy or not. Pappus reddish or tawny. S. Pyrrhopap'pus. 



c Stems leafy, leaves runcinate. Pappus silky-white, c. Lettuce. Lactu'ca. 



d Pappus brownish. Stems mostly leafy, with many heads, c. 



Hazvkweed. Hiera^'cium. 



d Pap. silky wl lite. Stemless ; scapes each with one head. W. Trox^imon. 



d Pappus silky white. Stems bear prickly leaves, c. Sow Thistle. Son'chus. 

 e Pappus of many small scales. Branched stems 2f. high. Heads axillary, 



large. Common. Eastward. Succory. Cicho''rium:. 



e Pappus of many hair-like bristles. 3-8f. Blue Lettuce. Mulge^dium, 



f Leaves on the stem linear, entire. Purpl. t Vegetable Oyster. Tragopo'gun. 



i Leaves all radical, toothed. Flowers yellow. Fruit taper-beaked. 



Hawhbit. Leon'todon. 



