ANALYTICAL KEY. 



The calyx and corolla together of either more or leas than six parts* CLASS I 



The calyx and corolla together of 6 parts: 



Stamens 6 or less CLASS II 



Stamens 9; Umbellularia, p. 106, or Eriogonum, 105 



Stamens 10; united sepals 5 Leguminosse, 38 



Stamens many; caducous sepals 2 Papaveracese, 20 



Stamens many; sepals 3 Sagittaria, 122 



CLASS I.— BXOGENS OR DICOTYLEDONS. 



Calyx and corolla both present. 



Petals not united (free) Division 1 



Petals more or less imited (cohering) Division 2 



Corolla wanting; calyx often petaloid, sometimes wanting Division 3 



DIVISION' I.— POLYPETAIlS:. 



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

 petals. 



1. HYPOGYNOUS, «. «., on the receptacle (not adhering to the sepals or petals). 

 • PistiUfew to many distinct carpels, rarely one. 



Calyx deciduous, sepals 5 Ranunculaceas, 16 



Calyx caducous, sepals 2 or 3 Papaveraceae, 20 



Calyx persistent, sepals 3 or 4; aquatic plants Njrmpbaeaceae, 20 



Calyx persistent; leaves all radical Rosaceae, 49 



Calyx petaloid; corolla wanting Ranunculaceas, 16 



* * Pistil one and compound, as shoum by two or more stigmas, or more than one cell in the 



ovary. 



Petals more numerous than the sepals. 



Indefinitely numerous, slender, persistent; aquatic plants Nympliseacese, 20 



Just twice as many (4-6) ; sepals caducous Papaveraceae, 20 



Five to sixteen; sepals persistent; fleshy herbs Portulaoaceae, 29 



• Malantbemum (seep. 116) has a 4-psrted perianth; i stamens and 2 or 3 parallel- reined leave*. 



