3 
I, a. — THALAMIFLORAL EXOGENS. 
Stamens fewer than 20. 6 
Stamens more than 20. 
Leaves with stipules. 4- 
Leaves without stipules. 
Carpels combined into a single ovary. Placentas more than 
one. 1 
Carpels distinct, — or solitary. 
Stamens united into one set or more. Hypericaceas. p. 61 
Stamens distinct. 
Carpels immersed in a flat-topped, fleshy disc. 
NELUMBIACEiE. p. 46.^ 
Carpels not immersed in the disc. 
Embryo enclosed in a vitellus or sac. Aquatic. 
Cabojibacea:. 
Embryo not enclosed in a vitellus, — minute. 
Seeds with an aril. Trees or shrubs. Dilleniace^e. 
Seeds without an aril. 
Albumen of the seeds mottled. Anonaceas. p. 4-3. 
Albumen of the seeds homogeneous. 
Flowers perfect, having both stamens and pistils. 
Ranunculaceas. p. 33. 
Flowers imperfect, — some staminate, some pistillate. Trail- 
ing shrubs. SCIIIZANDRACEAS. 
1. — Placentas in the axis. 2 
Placentas parietal. 
Seeds without albumen. Capparidaceas. p. 56 
Seeds albuminous. 
Embryo in a vitellus, or sac. Aquatic. Nym PHA3 A C E A3 . p. 46. 
Embryo not in a vitellus. 
Seeds contained in a pulp. Juice watery. Flacourtiaceas. 
Seeds not contained in a pulp. Juice milky. 
Papaveraceas. p. 48. 
