14 KEY TO FAMILIES. 



Umbels simple, panicled ; styles 4 or 5; fruit berry-like 



Araliaceae, p. 285. 

 Flowers not in umbels. 



Styles or stigmas 2 to 5; calyx 5-lobed; petals 5; stamens 5 or 10; fruit 



a 1 to 3-celled capsule Saxifragaceae, p. 197. 



Style 1. 



Sepals and petals 4 (rarely 5 or 2), the stamens commonly twice as 



many; fruit commonly a 4-celled capsule Onagraceae, p. 272. 



Sepals and petals 5; stamens numerous; fruit a 1-celled capsule opening 



at the top; rough-hairy herbs Loasaceae, p. 267. 



Sepals 2; petals 4; stamens 7 to 20; style mostly 3 to 8-parted ; fleshy 



herb Portulaca, p. L59. 



Style none; stigmas 4; leaves in whorls; aquatic plants 



Halorageae, p. 284. 



III. SYMPETALOUS DIVISION. Calyx and corolla both present, the 



latter with the petals united, at least at base. 



A. Stamens free from the corolla; anthers opening by a pore at the top. 



Petals .1; stamens 8 or 10; ovary superior or inferior; leaves simple; trees, 

 shrubs or herbs Eeicaceae, p. 308. 



B. Stamens inserted on the corolla; anthers opening by longitudinal slits. 



1. Stamens more than 5; ovarv superior. 

 Petals 5. 



Pistils 4 or 5, distinct; stamens 10 Crassulaceae, p. 194. 



Pistil 1. 



Stamens 10, di- or mon-adelphous, rarely distinct. 



Flowers papilionaceous; ovary 1-celled; style 1, entire; leaves com- 

 pound (except Cercis) Leguminosae, p. 214. 



Flowers regular; ovary 5-celled; style 5-lobed; leaves 3-foliolate 



Oxalidaceae, p 241. 

 Stamens indefinite, monadelphous ; ovary 5 to many-celled, either splitting 



into as many carpels when ripe or capsular Malvaceae, p. 257. 



Petals less than 5. 



Leaves entire; petals •"> ; sepals 5, 2 petal-like; stamens (i to 8; ovary 2- 



celled; flower imitating the papilionaceous Polygalaceae, p. 244. 



Leaves divided; petals 4 in two dissimilar pairs; sepals 2; stamens 6 



Dicentra, p. 178. 

 2. Stamens 5 or less. 

 a. Ovary superior, i. < .. fret from ih< calyx. 

 -j- Corolla regular. 



Pistil l. 



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



Style 1; fruit a capsule Pbimulaceae, p. 315. 



Styles 5; fruit a utricle or achene Pltjmbaginaceae, p. 318. 



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 cell, .1. 



Corolla-tube commonly with internal scales or appendages; flowers 

 5-mer0U8, in coiled racemes or spikes, or in heads or often solitary; 

 ovary 1 celled, or 2 celled by the intrusion or union of the placentae 

 in the axis; style 2-cleft, sometimes entire, or styles 2 and distinct. 



Hydrophyllaceae, p. 336. 



