SAXIFRAGACEAE. 1 85 



Placentae axial. 



Carpels distinct; leaves coriaceous, 



without stipules. 249. Leptarrhena, 188. 



Carpels united, at least below; leaves 

 mostly not coriaceous. 

 Stamens 10. 250. Saxifraga, 189. 



Stamens 5. 



Ovary superior. 251. Bolandra, 191. 



Ovary not superior. 



Rootstocks bearing bulb- 

 lets; ovary almost wholly 

 inferior. 252. Hemieva, 192. 



Rootstocks not bearing 

 bulblets; ovary half- 

 inferior. 

 Seeds winged; petals per- 

 sisting^ 253. Sullivantia, 192. 

 Seeds wingless ; petals 



promptly deciduous. 254. Therofon, 192. 

 Placentae parietal or nearly basal. 

 Stamens 8 or 10. 



Petals none; stamens 8. 255. Chrysosplenium, 193. 



Petals present; stamens 10. 



Carpels unequal; petals entire. 256. Tiarella, 193. 

 Carpels equal; petals laciniate. 257. Tellima, 194. 

 Stamens 5 or 3. 



Petals pinnatifid. 258. Mitella, 194. 



Petals entire or wanting, at least 

 not pinnatifid. 

 Stamens 3 ; calyx tubular. 259. Leptaxis, 195. 



Stamens 5; calyx campanulate 

 or turbinate. 

 Inflorescence a raceme. 260. Elmera, 196. 



Inflorescence a panicle. 261. Heuchera, 196. 



245. WHIPPLEA. 



Low diffuse shrubs, pubescent with simple hairs; leaves 

 opposite, short-petioled, without stipules; flowers white, in 

 cymose clusters on a naked terminal peduncle; calyx 5-cleft, 

 whitish, the tube adherent to the lower part of the ovary; petals 

 5, ovate or oblong, contracted at base; stamens usually 10; 

 styles distinct, subulate; ovary 3-5-celled, each cell 1-ovuled; 

 capsule septicidally dehiscent into 3-5 1-seeded parts. 



Whipplea modesta Torr. Stems trailing, 20-60 cm. long; leaves oval to 

 ovate, acutish, pubescent, sessile or nearly so, entire or few-toothed, 1-3 cm. 

 long; cymes few-flowered; calyx campanulate, its lobes ovate; petals white, 

 about 3 mm. long, exceeding the calyx-lobes; capsule globose. 



Lake Crescent, Clallam County, Washington, Webster, and southwards 

 to California. 



246. RIBES. Currant. Gooseberry. 



Low sometimes prickly shrubs; leaves alternate, often fas- 

 cicled, palmately- veined and lobed; flowers small, solitary or 



