Key. 



Pistil i as to the ovary, styles and stigmas sometimes several. 



Ovary simple, i-celled, 2-ovuled. ROSACES, page 56. 



Ovary simple; numerous ovules on i parietal placenta; leaves lobed and 



peltate. PODOPHYLLUM in BERBERIDACE^;, page 43. 



Ovary compound, i -celled. 



Placenta central. PORTULACACE.E, page 36. 



Placentae parietal, 2 or more. PAPAVERACE;E, page 45. 



Ovary 2-several-celled, free from the calyx. 



Stamens 5-10 adelphous. TILIACE^:, page 78. 



Stamens monadelphous. MALVACEAE, page 78. 



Ovary 2-s-celled; calyx borne at the summit, trees or shrubs, with stipulate 



leaves. ROSACES, page 56. 



Plants without stipulate leaves. SAXIFRAGACE^E, page 54. 



(2) Stamens of the same number as the petals and opposite them. 



Ovary i-celled; style 3-cleft; sepals 2. PORTULACACE^G, page 36. 



Ovary i-celled; style simple. BERBERIDACE^E, page 42. 



Ovary 2-6-celled. 



Calyx lobes mostly obsolete ; plants climbing by coiled tendrils, or sucker- 

 like disks. VITACE^;, page 76. 



Calyx 4~5-cleft; small shrubs or trees. RHAMNACE/E, page 75. 



(3) Stamens not more than twice as many as the petals; alternate with them when of 



the same number. 



(a) Ovary superior; not adherent to the calyx. 

 Pistils 2 or more, and separate. 



Stamens coherent by their anthers, and united to a fleshy disk sur- 

 mounting the two pistils. ASCLEPIADACE^:, page 91. 

 Stamens distinct on the receptacle. Leaves punctate. 



RUTACEVE, page 71. 

 Stamens separate on the receptacle. Leaves not punctate. 



RANUNCULACE>E, page 38. 

 Pistils 2-5, somewhat united at the bases of the ovaries; trees or shrubs. 



SAPINDACE^E, page 74. 



Pistil i and simple, with i parietal placenta, or sometimes 2-celled, with 

 a row of ovules in each cell. LEGUMINOS.E, page 65. 



Pistil i, compound, as shown by the number of cells, placentae, styles, or 

 stigmas. 

 Ovary i-celled. 



Corolla irregular; petals 4, somewhat united; stamens 6, and 

 diadelphous. FUMARIACE.E, page 46. 



Corolla irregular; petals and stamens 5; placentae 3, parietal. 



VIOLACE.E, page 79. 

 Corolla nearly or quite regular. 



Ovule i ; styles or stigmas 1-3. Shrubs or trees. 



ANACARDIACE,E, page 73. 



Ovules more than i on a central or basal placenta; herbs 

 with tumid nodes. CARYOPHYLLACE.E, page 37. 



Ovary 2 or more celled. 



Flowers irregular; ovary 3-celled. SAPINDACE^E, page 74. 



Flowers nearly or quite regular. 



Stamens tetradynamous (sometimes fewer than 6) ; petals 4. 



CRUCIFER^E, page 47. 



