1 84 CRASSULACEAE. 



long, becoming white-scarious when old; axils of the cauline leaves commonly 

 bearing short deciduous leafy branches by which the plant is propagated; 

 flowers yellow, sessile, in an open cyme; petals lanceolate, acuminate, 5-6 mm. 

 long, longer than the stamens; follicles diverging from their united bases. 

 On rocks, rather rare west of the Cascade Mountains, but common in the 

 interior. A form occurring at Elk Rock near Portland, Oregon, has solitary 

 terminal flowers, the others being replaced by propagula. This has been 

 described as a distinct species under the name 5. unijlorum Howell. 



Sedum stenopetalum Pursh. Perennial from branched rootstocks, glabrous 

 or minutely puberulent, green; stems erect, 6—15 cm. high; leaves lanceolate, 

 broadest at base, acute, sessile, 4-8 mm. long; flowers bright yellow, nearly 

 sessile, in a close cyme; petals lanceolate, acuminate, twice as long as the 

 sepals; carpels 4 mm. long, divergent only at the tips. 



On cliffs in the mountains at moderate altitudes. 



244. GORMANIA. 



Low perennial herbs with horizontal root-stocks; leaves 

 spatulate to obovate, the cauline similar to but smaller than 

 the basal ones; flowers yellow to red, in compound cymes; calyx 

 mostly deeply 5-lobed, the lobes acute or obtuse; petals 5, united 

 below the middle, acute to acuminate, spreading above; stamens 

 10, epipetalous; carpels many-ovuled, erect or nearly so in fruit. 



This genus is very feebly separable from Sedum. 



Gormania oregana (Nutt.) Britt. Glabrous, bright green; stems de- 

 cumbent, 10-20 cm. long; leaves broadly spatulate, scattered rather equally; 

 flowers yellow, becoming pink in age, in a compound cyme; petals Unear- 

 lanceolate, attenuate-acuminate, somewhat united at base; stamens only half 

 as long as the petals. 



On rocks, especially at low altitudes in the mountains. 



Family 48. SAXIFRAGACEAE. Saxifrage Family. 

 Herbs or shrubs; leaves alternate or opposite; stipules usually 

 none; flowers perfect or polygamo-dioecious ; calyx usually 5- 

 lobed, free or adherent to the ovary; petals usually 4 or 5, peri- 

 gynous, rarely none; stamens usually definite in number and 

 not more than twice the number of the calyx-lobes; pistil formed 

 by the partial or complete union of 2-5 carpels; placentae axile 

 or parietal; seeds usually numerous; endosperm present; em- 

 bryo small. 



Shrubs. 



Low and spreading or trailing; stamens usu- 

 ally 10 or 12. 245. Whipplea, 185. 

 Erect; stamens 5 or many. 



Leaves alternate. 246. Ribes, 185. 



Leaves opposite. 247. Philadelphus, 188. 



Herbs. 



Staminodia present; carpels 3 or 4, united. 248. Parnassia, 188. 

 Staminodia none; carpels 2, distinct above. 



