372 EXOGENOUS OR DICOTYLEDONOUS PLANTS. 



Shrubs or trees, with stipules ; aestivation imbricative. MAGNOLIACE.E, p. 377. 

 Without stipules; aestivation valvular. ANONACE^:, p. 378. 



* Stamens few or definite. Pistils few or solitary. 



Climbing plants. Mono-dioecious. MENISPERMAC.E, p. 379. 



Shrubs or herbs. Flowers perfect. BERBERIDACE^:, p. 380. 



Group 2. Ovaries several, either distinct, or perfectly united into a com- 

 pound pistil of several cells. Stamens definite or indefinite, inserted on 

 the receptacle or torus. Embryo inclosed in a sac at the end of the albu- 

 men, or in Nelumbium without albumen. Aquatic herbs. 



Carpels distinct and free. Stamens 6 -18. CABOMBACE^E, p. 381. 



Carpels distinct, immersed in a dilated torus. NELUMBIACEJE, p. 382. 



Carpels united in a several-celled many-ovuled ovary. NYMPH.EACE.E, p. 383. 



Group 3. Ovary compound, 5-celled, with the placentae in the axis. Sta- 

 mens hypogynous, indefinite. Seeds numerous, anatropous, albuminous, 

 with a small embryo. Marsh herbs, with pitcher-shaped or tubular 

 leaves. SARRACENIACE^:, p. 383. 



Group 4. Ovary compound, with parietal placentae. Calyx and corolla 

 2 -4-merous, deciduous. Stamens hypogynous. Flower unsymmetrical. 

 Embryo small in copious albumen, or coiled when there is no albumen. 



Seeds albuminous: embryo small or minute. 



Polyandrous: flower regular. PAPAVERACE.E, p. 383. 



Diadelphous or hexandrous : flower irregular. FUMARIACE-E, p. 385. 

 Seeds without albumen : styles and stigmas united. 



Pod two-celled. Radicle folded on the cotyledons. CRUCIFERJE, p. 385. 



Pod one-celled. Embryo rolled up. CAPPARIDACEJE, p. 386. 



Seeds without albumen. Styles or stigmas several. RESEDACEJE, p. 387. 



Group 5. Ovary compound, with parietal placentae. Floral envelopes 

 mostly 5-merous; the calyx persistent. Stamens hypogynous. Seeds 

 albuminous. 



Anthers (5) adnate, introrse, connate. Corolla irregular. VIOLACE^, p. 387. 

 Anthers extrorse, or innate, distinct. Corolla regular. 



Vernation circinate. Petals marcescent. DROSERACEJE, p. 388. 



Vernation straight. Petals usually caducous. CISTACEJE, p. 389. 



Group 6. Ovary compound with the placentas parietal, or 2- 5-celled from 

 their meeting in the axis. Stamens hypogynous. Seeds with a straight 

 embryo and very little or no albumen. 



Sterile filaments or a lobed appendage before each petal. PARNASSIE^E, p. 389. 

 Sterile filaments none : leaves opposite. > 



Stipules none; leaves dotted. Stam. unsymmetrical. HYPERICACEJE, p. 390. 



Stipules present: leaves dotless. Stam. symmetrical. ELATINACE.S:, p. 391. 



Group 7. Ovary compound, one-celled with a free central placenta, or 

 2-several-celled with the placenta in the axis. Calyx free or nearly so. 

 Stamens hypogynous or perigynous. Embryo peripheric, coiled more or 

 less around the outside of mealy albumen. 



