14 KKY TO •-.HED ri-ANT8. 



Petals less than 5. 



Leaves entire; petals 3; sepals 5, 2 petal-like; stamens 6 to 8; 

 ovary 2-eelled; flower imitating the papilionaceous . . 



POLYGALACB^, p. 248. 



Leaves divided; petals 4 in two dissimilar pairs; sepals 2; sta- 

 mens 6 . .... Dieentra formosa, p. 210. 



B. Stambms 5 OK LESS. 



I. Ovary superior, i. e., free from the calyx. 



Corolla regular. 



Stamens free from the corolla; ovary several-celled; shrubs 



ERiCACEji;, p. 367. 

 Stamens adnate to the corolla. 

 Pistil 1. 

 Stamens as many as the lobes of the corolla and opposite them. 

 Style 1; fruit a capsule . . . Peimulace^, p. 374. 



Styles 5; fruit a utricle or aehene 



Pltjmbaginaceje, p. 877. 

 Stamens as many as or fewer than the lobes of the corolla and 

 alternate with its lobes; fruit a capsule (or in Solanum a 

 berry). 

 Ovary 1 or 2-celled. 

 Styles 2, more or less distinct; flowers 5-merous; ovary 1 

 or 2-celled; leaves mostly alternate, usually toothed, 

 lobed or compound . . HYDKOPHTi.LACBiE, p. 432. 

 Style 1 or none. 



Ovary and capsule 1-celled; flowers 4 or 5-merous; 

 leaves simple and opposite or 3-foliolate and alter- 

 nate ' . G-BNTIANACB^, p. 378. 



Ovary 2-celled; fruit commonly 2-celled; stamens 5; 

 leaves alternate. 

 Leafless parasitic twining plant . ... 



Cuscuta, p. 388. 

 Leafy plants. 

 Corolla plaited in the bud; calyx of 5 distinct 



sepals ... . CosvoLVULACB^, p. 38-5. 

 Corolla valvate or plicate in the bud; calyx 

 5-toothed. . . . Solanace.e, p. 390. 

 Ovary 2 to 4-Gelled; capsule oireumscissile; corolla scarious; 

 stamens 2 or 4; style 1; acaulescent herbs 



PLANTAGlNE.iE, p. 418. 



Ovary 3-cellod, the flower otherwise 5-merous; style 3-cleft; 



capsule 3-valved Polemo!Niacb-15, p. 422. 



Ovary 4-celled and commonly 4-lobed, splitting at maturity 



into as many nutlets; stamens 5; styles 2, distinct; 



leaves alternate (at least the upper); flowci's in coiled 



racemes or spikes .... Boraginacic.e, p. 440. 

 Pistils 2 (the ovaries distinct but the styles or stigmas united), 

 becoming follicles; leaves opposite or whorled; plants with 

 milky juice. 



