C POLYPETALA 



* * PiMil compound, of S or more united carpels; a$ thoxen by wjort than one stigma4obt, 



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



Petals more nameroua than the sepals: 



Indefinitely numerous, slender, persistent. Aquatic plants. .N'ympb.SBacess, 17 



Just twice as many (4 or 6): sepals caducous Papaverace89, 18 



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



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



Leaves opposite : sepals equal HypericaceSB, S3 



Leaves alternate: sepals unequal Cistaceee, 26 



Leaves radical^ hollow, 2-appendage(i at hooded top SarraceniacesBt 18 



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



Leafless, thorny, fleshy plants: ovary prickly, inferior Cactaceas, 64 



Leaves mostly opposite, very fleshy: ovary inferior Ficoideae, 65 



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



Shrubs: sepals 4 to 7 : flowers white Saxi f ragaceee, 54 



Leaves alternate or radical: herbs or shrubs Rosacess, 48 



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



3. Stamens on the claws of the petals. 



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



Stamens many, united into a tube: anthers small: petals 6 Malvaceae, 33 



Stamens 10 to 16, united half way: shrub Styracaceae, 77 



B. STAMENS 10 OB 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 Crassulacead, 57 



Leaves pinnate: styles united, globular ovaries distinct Geraniaceae, 36 



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



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



Ilerbs; leaves simple Saxifragaceae, 54 



Many. Stamens on the receptacle Ranunculaceae, 14 



Stamen* on tl»« o*lvi: leaves compound, mostly radical KosaceaB, 48 



