8 ANALYTICAL KEY. 



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



Pistils not corresponding in number with the petals or sepals. 



Stamens borne on the receptacle Ranunculaceag, 16 



Stamens borne on the calyx. 



Stipules persistent; leaves alternate Rosaceae, 49 



Stipules none or indistinct Sasifragaceae, 65 



* * 



Pistil only one. 



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



^-celled legume in Astragalus). 



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



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



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



-I — f- Pistil compound, as shown hy the cells or placenice, styles or stigmas. 



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



Petals and sepals 5; lower petal spurred Violaceae, 25 



Petals and sepals 5; corolla regular Saxifragaceae, 55 



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



Petals 4 or 6; sepals half as many, caducous Papaveraceas, 20 



Ovary and pod 2-celled; stamens 6 (2 and 4) Cruciferae, 22 



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



Sepals 2; fleshy herbs Portulacaceae, 29 



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



Petals and stamens 6; stems angled Lythraceae, 59 



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



Sepals 5; stamens 5, opposite the petals; herbs PlumbaginaceaB, 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 Rutaceae, 34 



Foliage not pellucid-punctate. 



Anthers opening by terminal pores Ericaceae, 68 



Anthers opening lengthwise. 



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



Stamens alternate with the petals when equal in number. 



Leaves lobed or compound; stamens 10 Geraniaceae, 83 



Leaves simple and entire; stamens 5 Linaceae, 32 



Leaves opposite and stipulate Geraniaceae, 33 



Stamens on the calyx; style 1 Lythraceae, 59 



