ANALYTICAL KEY. 



Leaves pinnate. (Styles partly united.) Geraniaceae, 33 



Pistils not corresponding in number with the petals or sepals. 



Stamens borne on the receptacle Rammculaceae, 16 



Stamens borne on the calyx. 



Stipules persistent; leaves alternate Rosaceae, 49 



Stipules none or indistinct Saxifragaceae, 55 



* * Pistil only one. 



4- Simple, i. e., of one carpel, as shown by the single style, stigma, and cell (apparently 

 2-celled legume in Astragalus). 



Stamens opposite the petals and sepals, in threes; fruit a berry Berberidacese, 19 



Stamens 10, monodclphous or diadelphous; fruit a legume Legumiiiosae, 38 



Stamens on the calyx; fruit a drupe or akene Rosaceae, 49 



-I- -{- Pistil compound, as shown by the cells or placentas, styles or stigmas. 



Ovary 1-celled, placentas (2 to 4, rarely more) on the sides. 



Petals and sepals 5; lower petal spurred Violaceas, 25 



Petals and sepals 5; corolla regular Saxifragacoae, 55 



Petals 4, bract-like sepals 2; flower irregular Fumariacese, 22 



Petals 4 or G; sepals half as many, caducous Papaveracece, 20 



Ovary and pod 2-celled; stamens G (2 and 4) Cruciferas, 22 



Ovary and capsule 1-celled; seeds on a central placenta. 



Sepals 2; fleshy herbs Portulacaceaa, 29 



Sepals 5 or 4; leaves opposite on swollen nodes Caryopliyllacese, 27 



Petals and stamens G; stems angled LythracoaSj 59 



Sepals and petals (4 to 9) usually 5; shrubs; leaves 3-foliolate. . . Anacardiaceae, 38 



Sepals 5; stamens 5, opposite the petals; herbs Pluinbaginaceas, 71 



Ovary more than 1 -celled; seeds attached to the axis or base or summit. 



Flowers very irregular; ovary 2-celled; pods flattened, 2-seeded. . Polygalaceae, 27 

 Flowers regular or nearly so. 



Foliage pellucid-punctate; strong-scented shrubs Rutaceas, 34 



Foliage not pellucid-punctate. 



Anthers opening by terminal pores Ericaceas, 68 



Anthers opening lengthwise.' 



Stamens as many a3 the petals and opposite them Rhamnaceae, 35 



Stamens alternate with the petals when equal in number. 



Leaves lobed or compound; stamens 10 Geraniacoas, 33 



Leaves simple and entire; stamens 5 Llnaceaa, 32 



Leaves opposite and stipulate GcraiaiaceEe, 33 



Stamens on the calyx; style 1 Lythraceae, 59 



