10 POLYPETAL^E. 



Calyx persistent, sepals 3 or 4: growing iu water Nymphaeaceae, 18 



Calyx persistent, sepals 5 or 10: leaves with stipules Rosaceas, 35 



Calyx of petal-like sepals: corolla often wanting Ranuneulaceae, 17 



* Pistil compound, of % or more united carpels as shown by more than one stigma-lobe, 

 stigma, style or cell in the ovary; or by its not being at all one-sided. 



Petals more numerous than the sepals: 



Indefinitely numerous, slender, persistent. Aquatic plants . Nymphaeaceae, 18 



Just twice as many (4 or 6): sepals caducous Papaveraceae, 19 



Five to sixteen: style 3-8 cleft: fleshy herbs Portulacaceae, 26 



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



Leaves opposite: sepals equal Hypericacese, 25 



Leaves alternate: sepals unequal Cistaceae, 23 



Leaves radical, hollow, 2-appendaged at hooded top Sarraceniaceae, 19 



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



Leafless, thorny, fleshy plants: ovary prickly, inferior Cactaceae, 43 



Leaves mostly opposite, very fleshy: ovary inferior Ficoideae, 43 



Leaves opposite. Shrub: sepals and petals numerous Calycanthaceas, 36 



Shrubs: sepals 4 to 7: flowers white Saxifragaceae, 36 



Leaves alternate or radical: herbs (ovary not inferior) or shrubs Rosaceee, 35 



Leaves alternate; no stipules: rough herbs: ovary inferior Loasaeeae, 42 



3. Stamens on the claws of the petals. 



Stamens many, distinct, anthers long: calyx a conical cap: petals 4 . Papaveracese, 19 



Stamens many, united into a tube: anthers small: petals 5 Malvaceae, 27 



Stamens 10 to 16, united at base or half way: shrub Styracaceae, 50 



B. STAMENS 10 O*B LESS. 



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

 sometimes 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, 38 



Leaves pinnate: styles united, globular ovaries distinct ... Geraniaceae, 28 



