12 ANALYTICAL KEY 



Sepals 4 49. Capparidaceae, 231 



Placentae central; juice watery; sepals 2 41. Pohtdlacaceae, 176 

 Ovary several-celled. 



Calyx valvate in bud; stamens united 72. Malvaceae, 816 



Calyx imbricate in bud ; stamens not united 43. N ymphaeaceae, 188 

 Calyx more or less united to a compound ovary. I 



Ovary 1-5-celled (10-celled in one genus oi Pomaceae), 



Fleshy-stemmed, without true leaves; petals numerous 78. Cactacbab, 326 

 Leaves present. 



Sepals or calyx-lobes 2; ovules arising from the base of a 



1-celled ovary ^ 41. Poktulacaceae, 176 



Sepals or calyx-lobes more than 2. 



Leaves opposite ; stipules none 53. Htdranqeaceae, 243 



Leaves alternate. 

 Stipules present. 



Carpels distinct, free from the calyx-tube; fruit achenes, 

 follicles, or drupelets. 

 Carpels several or numerous, or if solitary becoming 



an achene 64. Rosaceae, 245 



Carpel solitary, becoming a drupe 56. Dhupaceae, 269 



Carpels united, inclosed by and adnate to the calyx- 

 tube; fruit a pome 55. Pomaceae, 265 

 Stipules wanting ; herbage rough-pubescent 77. Lo asaceae, 324 



Stamens not more than twice as many as the petals. 



Stamens of the same number as the petals and opposite them. 

 Ovary 2-4-ceUed. 



Calyx-lobes minute or obsolete; petals valvate 71. Vitaceae, 315 



Calyx 4^5-cleft; petals involute 70. Rhamnaceae, 314 



Ovary l-celled. 



Anthers opening by uplifted valves 46. Berberidaceae, 204 



Anthers not opening by uplifted valves. 



Style 1, unbranched; stigma 1 90. Primulaceae, 372 



Styles, style branches, or stigmas more than 1; sepals or 



calyx-lobes 2 41. PoRTUiiACACBAB, 176 



Stamens not of the same number as the petals, or if of the same 

 ' ■ number alternate with them. 



Calyx free from the ovary, i. e., ovary wholly superior. 

 Ovaries 2 or more, wholly separate or somewhat united. 



Stamens united with each other and with a large thick stigma 



common to the two ovaries 95. Asclepiadaceae, 386 



Stamens free from each other and from the pistils. 

 Stamens on the receptacle, free from the calyx. 



Leaves punctate with translucent dots; shrubs 62. Rutacbae, 306 

 Leaves without translucent dots; herbs. 



• Leaves fleshy 50. Crassulaceab, 232 



Leaves not fleshy. 



Ovary or lobes of the ovary 2-5, with a common 

 style. 

 Ovary 2-3-lobed 66. Limnanthaceae, 312 



Ovary 5-lobed 58. Geraniaceae, 302 



0'^rie.<s with separate styles or sessile. stigmas 



45. Ranunculaceae, 189 



