12 KEY TO SEED PLANTS. 



Trees or shrubs. 

 Stamens twice as many as the petals and alternate with them. 

 Leaves alternate, trifuliolate. 



Styles or stigmas 3; fruit drupe-like 



Anacakdiace^, p. 250. 



Style]; fruit a 2-celled, 2-seeded samara 



KuTACBiB, p. 249. 

 Leaves opposite, simple; style 1 or none; fruit a 3 to 5-celled 

 capsule; seeds with an aril. . CELASTRACEiE, p. 252. 

 Stamens 4 or 5, as many as the petals and opposite them. 



Shrubs; petals often hooded, commonly with claws; ovary 

 commonly 3-ceUed, splitting when ripe into 3 one-seeded 



parts KHAMKACBiE, p. 253. 



Woody vine, climbing by tendrils; petals early deciduous, 



cohering by their tips; fruit a berry 



VlTACE^, p. 259. 

 Stamens 7 to 9; petals 5, equal; fruit a double samara; leaves 



simple Acer macrophyllum, p. 252. 



Stamens 5 to 8; petals 4 or 5, clawed, slightly irregular; fruit a 



1-seeded capsule; leaves palmately compound 



Sapindace^, p. 251. 

 Herbs; stamens 8 to 30; petals 4 to 7, laciniate; disk 1-sided 



EBSKDACEiE, p. 230. 



Stamens on the calyx. 

 Corolla regular. 

 Stipules present; pistils one to several, sometimes partly united 

 to the disk; petals 5; stamens 10 to numerous; leaves 

 alternate, often compound . . KosACEiE, p. 275. 

 Stipules none; leaves simple. 



Pistils many, concealed in a hollow receptacle; leaves opposite, 



simple Caltcanthace^e, p. 190. 



Pistil 1; petals 5; stamens 5 or 10 



Saxifkagace^, p. 267. 

 Pistil 1, becoming a capsule enclosed by, but free from, the 

 tubular calyx; stamens 4 to 12; leaves simple, entire . . 



Lythracb^, p. 328. 

 Corolla irregular, papilionaceous; stamens monadelphous, or dia- 

 delphous, rarely distinct; fruit a legume; leaves commonly 

 compound ... Leguminos.e, p. 288. 



B. OVAKY INPEEIOR, I. B., MORE OR LESS ADHERENT TO THE CALYX. 



I. Trees and Shrubs. 



Stamens more numerous than the petals; petals 5. 



Leaves alternate; fruit a pome .... RosACEiE, p. 275. 



Leaves opposite; fruit a capsule; trailing undershrub 



Whipplea, p. 272. 

 Stamens as many as the petals and opposite them; petals 5, hooded; 

 fruit 3-celled, 1 seed in each cell . . Oeanothus, p. 254. 



