SAXIFRAGE FAMILY 191 



3-5. pistils 3-5, separate, follicles few-=everal-seeded ; flowers solitary or 

 cymose, axillary or terminal ; leave? fleshy, opposite, entire ; aquatic or 

 marsh herb. 

 Stems 1-6 cm. long; leaves linear-oblong, 4-6 mm. 



long; flowers 1 mm. wide T. aqitdticum 



SAXIFRAGACEAE SAXIFRAGE FAMILY 



Sepals mostly 5, united, free or grown to the ovary, petals 4-5, rarely 

 none, -tamens 4-10, pistils 1-several, often 2, separate or united, styles 

 separate or united into one, fruit a capsule, follicle or berry; flowers per- 

 fect to dioecious, solitary ur variously clustered ; herbs or shrubs with 

 alternate or opposite leaves. 



1. Herbs 



a. Stamens with anthers 5, rarely 4 



( 1 j Leaves entire ; flowers flat, saucer-shaped Parxassia 



I( 2 ) Leaves toothed or lobed ; flowers bell- 

 shaped 

 (a) Petals cut or fringed Mitella 



(bj Petals entire 

 x. Ovary 1-celled, 2-beaked ; common Heuchera 



y. Ovary 2-celled, 2-beaked ; very rare Sullivaxtia 



b. Stamens 8-10 



(1) Petals present; stamens 10 

 (a J Petals entire Saxifraga 

 (b) Petals 3-7-parted Lithophragma 



(2) Petals absent, sepals yellowish; stamens 

 usually 8 Chrysosplexium 



2. Shrubs 



a. Stamens 8-10 



( 1 ) Leave? alternate, lobed ; ovary inferior ; 

 fruit a berry Ribes 



(2) Leaves opposite, not lobed; ovary partly 

 inferior; fruit a capsule 



(a) Leaves entire; flower solitary or 2-3; 

 stamens 8 Fendlera 



(b) Leaves toothed; flowers several in a 

 cluster; stamens 10 [amesia 



b. Stamens many; ovary inferior; flowers large, 

 white, solitary Philadelphia 



