6 POLYPETAL^. 



* * Phtil compound, of 2 or more united carpels; as shown by more than one stigma-lobe, 



sti'jma, style or cell in the ovary; or by its not heinrj at all one sided. 



Petals more numerous than the sepals: 



Indefinitely numerous, slender, persistent. Aquatic plants .. Nymphssaceae, 17 



Just twice as many (4 or 6): sepals caducous Pajpaveraceae, 18 



Five to sixteen; style 3-8-cleft: fleshy herbs Portulacaceas, 31 



Petals of the same number (5) as the persistent sepals. 



Leaves opposite: sepals equal < HypericaceSB, 33 



Leaves alternate: sepals unequal Cistaceae, 26 



Leaves radical, hollow, 2-appendaged at hooded top Sarraceniacese, 18 



2. Stamens and petals on the free or adnate calyx. 



Leafless, thorny, fleshy plants: ovary prickly, inferior Cactacese, G4 



Leaves mostly opposite, very fleshy: ovary inferior Ficoideae, Co 



Leaves opposite. Shrub: sepals and petals numerous Calycanthaceae, 53 



Shrubs: sepals 4 to 7: flowers white Saxifragaceae, 54 



Leaves alternate or radical: herbs or shrubs Rosaceae, 48 



Leaves alternate; no stipules: rough herbs: ovary inferior * Lioasaceae, 63 



3. Stamens on the claws of the petals. 



Btamens many, distinct, anthers long: calyx a conical cap: petals 4. . Papaveraceae, 18 



Stamens many, united into a tube: anthers small: petals 5 Malvaceae,* 33 



Stamens 10 to IG, united half way: shrub Styracacese, 77 



B. STAMENS 10 OR LESS. 



1. Ovary or ovaries superior (i.e., free from the calyx) or mainly so, but 

 sometim.es included in the calyx-tube. 



• Pistils more than one, not united. 



Pistils of the same number as petals and sepals. 



Leaves simple, entire, fleshy Crassulaceae, 57 



Leaves pinnate: styles united, glol^ular ovaries distinct Geraniaceae, 36 



Pistils not of the same number as tlie sepals and petals. 



Two or three. Shrubs or trees: leaves opposite, compound Sapindaceae, 38 



Herbs; leaves simple SaxifragaceaB, 54 



Many. Stamens on the receptacle Ranunculaceae, 1 4 



Stamens on the calyx: leaves compound, mostly radical Rosaceae, 48 



