508 



SYSTEMATIC BOTANY. 



Stamens not tetradynamous. 

 Large hypogynous disk. 

 Flowers tetramei'ous. Fruit closed 



at the apex Capparidaceoe. 16 



Flowers not tetramerous. Fruit 

 usually open at the apex 

 Small hypogynous disk, or none. 

 Albumen abundant. 

 Flowers irregular 

 Flowers regular. Sap milky. Fruit 



without central pulp 

 Fruit with central pulp, or fleshy. 

 Sap watery .... 

 Albumen in small quantity, or want- 

 ing. 

 Calyx tubular, furrowed 

 Placentas covering the dissepiments 

 Placentas axile. 

 Styles distinct to the base. 



Calyx valvate Vivianiacece. 



Calyx mvich imbricated. 

 Seeds smooth. Petals unequal-sided, 



without appendages . . . ffypericaceoe. 

 Seeds shaggy. Petals unequal-sided, 

 usually with appendages at the 

 base Reaumur iacece 



. Resedacece. 17. 



Fumariacece. 14. 

 Papaveracece. 13. 

 Flacourtiacece. 19. 



Frankeniacece. 

 Nymphoeacece. 



23. 

 10. 



36. 



37. 



Seeds smooth. Petals equal . . Linaceos. 65. 

 Calyx slightly imbricated. 

 Petals not twisted in asstivation. 

 Ovary with a free central placenta Caryophyllacece. 26, 

 Styles more or less combined. 

 Fruit gynobasic. 

 Stamens arising from scales . . Simarubacece. 63. 

 Stamens not arising from scales 

 Styles wholly combined. 

 Flowers hermaphrodite . . Rutacece. 59. 

 Flowei-s unisexual, or polygamous Xatithoxylacece. 60. 

 Styles divided at the apex. 

 Flowers irregular. Fruit usiially 



with elastic valves. . . Balsaminacece . 67. 

 Fruit not gynobasic. 



Calyx much imbricated in an irregu- 

 lar broken whorl. 

 Flowers symmetrical . . Clusiaceoe. 35, 

 Flowers uns3'mmetrical. 

 Flowers regular. 

 Petals with appendages at 

 their base. Leaves alter- 

 nate .... Sapindacece. 40. 

 Petals without appendages 

 at their base. Leaves op- 

 posite .... Aceraceoe. 44. 

 Flowers irregular. 

 Flowers falsely papiliona- 

 ceous. Ovary 2 — 3-celled Polygalaceoe. 41. 

 Flowers not papilionaceous 

 in appearance. Ovary 1- 

 celled .... Krameriacece. 42. 

 Calyx but little imbricated in a 

 complete whorl. 

 Carpels 4 or more. 



Seeds winged .... Cedrelacece. 48. 

 Seeds wingless. 

 Stamens united into a long tube Meliacece. 49. 



