Us. COMPOSITAE. 307. 



Hermaphrodite flowers fertile. 27. 



27. Scales between flowers long, deciduous. 26 CASSINIA. 



Scales between flowers, short, persistent. 



24 HEL1CHRYSUM. 



28. Flowers dioecious. Trees and shrubs. 29. 

 Flowers not dioecious. 30. 



29. Involucral bracts of male heads in 1 row, of female in 2 rows. 



Pappus none. 16 TARCHONANTHUS. 



Involucral bracts in several rows. Pappus of bristles. 



15 BRACHYLAENA. 



30. Inner flowers hermaphrodite but sterile (male). 31. 

 Inner flowers hermaphrodite and fertile. 39. 



31. Corolla of outer flowers strap-shaped. 32. 



Corolla of outer flowers thread-shaped. 36. 



32. Pappus of bristles. Shrubs. 30 MACOWAN1A. 



Pappus absent. 33. 



33. Marginal fruits of several kinds. (If curved then Calendula L. 



marigold). Fruits straight. Heads small. 



73 OLIGOCARPUS. 

 Marginal fruits all alike. 34. 



34. Fruits with 3 wings' and a cupular appendage. 



72 TRIPTERIS. 

 Fruits without wings or appendages. 35. 



35. Involucral bracts in 1 row or nearly so.- Fruits 3 angled, usually 



tubercled. 71 DIMORPHOTHECA. 



Involucral bracts in 2 or more rows. Fruits smooth. 



75 OSTEOSPERMUM. 



36. Pappus of bristles. 17 BLUMEA. 

 Pappus wanting, at least in marginal fruits. 37. 



37. All fruits without a pappus. 20 SPHAERANTHUS. 



Outer fruits without, inner with a pappus. 38. 



38. Heads in glomerules. Female corolla shortly toothed. 



21 AMPHIDOXA. 

 Heads in corymbs. Female corolla 2 cleft. Bristles 1 — 2. 



19 DENEKIA. 



39. Style branches of hermaphrodite flowers hairy outside from 



tip to below point of division. See 36, 37, 38. 



Style branches hairy only in their upper part. 4O. 



40. Style branches blunt or rounded. Marginal rows of stigmatic 



papillae confluent at apex. 4I. 



Style branches usually truncate. Marginal rows of stigmatic 



papillae not confluent at apex. 44. 



41. Pappus of 3—5 scales. 86 ANISOCHAETA. 



Pappus of bristles, or of scales and bristles. 42. 



42. Pappus of scales united below and 7 or more bristles. 



36 PULICAR1A. 



