ANALYTICAL KEY. 



Division 1. Polypetalae; calyx and corolla both present, the latter of separate 

 petals. 



A. Stamens more than 10, and more than double the number of petals. 



1. Ilypogynow^, i. e., on the receptacle free /rom the other j)<J-fts of the flower. 

 Pistils, few to many distinct carpels, rarely one. 



Calyx mostly deciduous; juice colorless Ranunculaceae. 16 



Calyx early deciduous; juice yellowish Papaveraceae, 20 



Calyx persistent; leaves peltate Nymphaeaceae, 20 



Pistil compound; cells or stigmas more than one. 

 Petals more numerous than the sepals. 



Indefinitely numerous, small and persistent; aquatic NymphaeaceaB, 20 



Just twice as many (4 or G), and both usually caducous Papaveraceae, 20 



Five to 16, and more numerous than the persistent sepals Portulacacese, 29 



Petals of the same number as the sepals. 

 Five, and the calyx persistent. 



Sepals valvate in the bud; stamens all united Malvaceae, 31 



Sepals overlapping in the bud (imbricated). 



Leaves opposite, entire, transparent-dotted Hypericaceae, 30 



Leav^es alternate, not dotted (punctate). 



Two outer sepals smaller Cistaceae, 25 



2. Perigynous or epigynous {on the free or adnate calyx). 



Fleshy herbs, with 3 or more cells to the ovary Ficoideae, 63 



Fleshy herbs, with l-cclled ovary Portulacaceae, 29 



Not fleshy; herbs or shrubs. 



Leaves opposite, simple; sepals and petals numerous Calycanthaceae, 5.') 



Leaves opposite, simple; sepals and petals 4 or 5 Saxifragaceae, oj 



Leaves alternate, with stipules Rosaceae, 49 



Leaves alternate, without stipules; rough herbs ■^ .... .Loasaceae, 62 



B. Stamens 10 or less, or if more, not exceeding twice the number of petals, or 

 sepals. 



1. Ovary or ovaries superior or mainly so (but sometimes inclosed in the calyx-tube). 

 * Pistils more than one, and distinct. 

 Pistils of tl^ same number as petals and sepals. 



Leaves simple, fleshy Crassulaceae, 58 



