COMPOSITAE (THISTLE FAMILY) 



62 a Flowers yellow 52. Tanacetum. p 237 



b Flowers white, pink, or purple 48. Achillea. p 236 



63 a Irregular or ray flowers numerous, more numerous than 



the regular or disk flowers 64 



b Irregular or ray flowers in i or 2 rows, usually less 



numerous than the regular or disk flowers 66 



64 a Flowers usually orange, sometimes spotted or striped 



with purple ; plants strong scented 38. Tagetes. p 235 

 b Flowers variously colored, rarely orange; plants not 



scented 65 



65 a Irregular flowers yellow; heads 2-4 in. broad 



35. Rudbeckia. p 234. 

 b Flowers and heads not completely as in a 



50. Chrysanthemum, p 237 



66 a Heads 2-4 in. broad 67 



b Heads 2 in. or less broad 68 



67 a Irregular flowers 6-10 35. Rudbeckia. p 234. 



b Irregular flowers numerous 28. Gaillardia. p 234. 



68 a Receptacle of head chaffy 69 



b Receptacle of head not chaffy 70 



69 a Irregular or ray flowers white or yellow ; leaf segments 



usually linear 49. Anthemis. p 236 



b Irregular or ray flowers purple, red, or yellow; leaf 



segments not linear 28. Gaillardia. p 234. 



70 a Receptacle of head conic or hemispheric; leaf segments 



usually linear or thread-like.... 51. Matricaria. p 237 

 b Receptacle of head flat or convex ; leaf segments not 



as in a 50. Chrysanthemum, p 237 



71 a Irregular flowers numerous, in several rows; garden 



plants 72 



b Irregular flowers in i or 2 rows 74 



72 a Leaves usually entire or sparingly toothed 



37. Calendula, p 235 

 b Leaves coarsely toothed or lobed 73 



73 a Plant 3-10 ft. high; flowers yellow 35. Rudbeckia. p 234 

 b Plant 1-2 ft. high; flowers usually not yellow 



39. Callistephus. p 235 



74 a Irregular or ray flowers yellow 75 



b Irregular or ray flowers not yellow 84 



75 a Heads 2-4 in. broad 76 



b Heads 2 in. or less broad 78 



76 a Outer bracts of involucre ovate ; leaves 4-20 in. long, 



broadly oblong 27. Inula. p 234 



b Outer bracts of involucre usually lanceolate 77 



15 225 



