14 



KKY TO SEED PLANTS. 



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

 ovan-2-cel led: flower imitating the papilionaceous . . 



POLYGALACEiE. p. 248. 



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

 meng q Dicentra formosa. p. 210. 



B. Stamens 5 or less. 



t |. Ovary superior, i. e., free from the calyx. 



"enff-.V the cWl* ,-varv several-cei.ed; shrub* . . . 



ERICACEJ5, p. ob(. 



Stamens adnate to the corolla. 



P Stamens a, many as the lobes of the corolla and opposite them. 

 Style 1; fruit a capsule . . . Primulace^e. p. <><4. 



Stvles 5: fruit a utricle or achene • • • • 



Pltjmbagixace.e . p. Of/. 



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). 



Ovarv'l or 2-celled. , 

 Stvles 2. more or less distinct; flowers o-merous; ovary 1 

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

 lobed or compound . . Hyprophyllace.e, p. 432. 



^ar^anT'capsule 1-celled; flowers 4 or 5-merou S; ■ 

 leaves simple and opposite or 3-foliolate and alter- 

 nate . • . Gentian ace js, p. 3/8. 

 Ovary 2-ce'Hed;' fruit commonly 2-celled; stamens 5; 

 leaves alternate. 



Leafless parasitic twining plant . . . 



Cuscuta, p. 38b. 



L ctolfrplited in the bud; dy* "f 5 distinct 

 <epa£ . Convolvulace^:, p. 385. 



Corolla valvate or plicate in the bud; calyx 

 5-toothed. . . . SoLANACEiE, p. 390. 



Ovary 2 to 4-celled; capsule circumscissile; corolla scanous; 

 stamens 2 or 4; style 1; acaulescent herbs. . ... . • 



Plantauinejs, p. 418. 

 Ovarv 3-celled. the flower otherwise 5-merous; style 3-clett: 



capsule 3-valved Polemoniacejs, 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); flowers in coiled 

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

 Pistils S (the ovaries distinct but the styles or stigmas united , 

 ^wJi^ > Sle*; leaves opposite or whorled; plants with 

 milky juioe. 



