WESTERN MIDDLE CALIFORNIA. 13 



Stamens as many as the petals and alternate with them. 



Petals 4; style 1; flowers small, in cymes, or if in ix head, sur- 

 rounded by a conspicuous eorolla-lilce involucre; fruit drupe- 

 like; leaves opposite Cornacb/e, p. 360. 



Petals (in ours) 5; stj'les 2, more or less distinct; flowers in racemes 

 or solitary; fruit a smooth or prickly berry; leaves alternate. 



Ribes, p. 272. 



2. Herbs. 



Petals and stamens numerous; fruit 10 to 12-celled, dehiscing at 

 summit; succulent maritime herb . Mesembryanthemum,p. 190. 

 Petals 5 or fewer. 

 Styles 4 or 5; flowers in panicled umbels; fruit berry-like 



ARALIACEiB, p. 339. 

 Styles 2; flowers in simple or compound umbels, sometimes capi- 

 tate; fruit splitting into 2 one-seeded carpels 



irMBEi,LirER.a;, p. 340. 

 Style 1. 



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



as many; fruit commonly a 4-celled capsule 



ONAGKACEa:, p. 325. 

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



opening at the top; rough-hairy herbs 



LoASACBiE, p. 321. 

 Sepals 2; petals 5; stamens 7 to 20; style mostly 3 to 8-parted; 



fleshy herb Portu'.ara, p. 184. 



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



HaloraoBjK, p. 338. 



III. SYMPETALOUS DIVISION. Calyx and corolla both pres- 

 ent, the latter with the petals united, at least at base. 



A. Stamens more than 5. 



Anthers opening by a hole at the top; stamens 8 or 10; ovary superior 

 or inferior; leaves simple; trees, shrubs or parasitic plants . . . 



Eeicacb^, p. 367. 

 Anthers opening by longitudinal slits; ovary superior. 

 Petals 5. 



Pistils 4. or 5, distinct; stamens 10 



CKASsuLACBa:, p. 264. 

 Pistil 1. 

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



Plowers papilionaceous; ovary 1-celled; style 1, entire; 



leaves compound (except Cercis) 



LBQtrMiNos.a;, p. 288. 

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



S-foliolate Oxalis, p. 245. 



Stamens indeflnite, monadelphous; ovary 5 to nJany-celled, 

 either splitting into as many carpels when ripe or capsular. 

 Malvace^s;, p. 236. 



