346 CRASSULACEAE 



2. Sedum radiatum S. Wats. Star-fruited Stonecrop. Fig. 2213. 



Sedum radiatum S. Wats. Proc. Amer. Acad. 18: 193. 1883. 



Annual, propagating by deciduous axillary buds, stems simple or branching from the base, 

 7-18 cm. high. Leaves oblong to oblong-ovate, 5-10 mm. wide, slightly clasping at base, thin and 

 flattened, becoming white-margined, veined and papillose ; branches of the cyme 3 to several, 

 elongated; flowers sessile, scattered; sepals triangular-lanceolate, 2 mm. long; petals yellow, 

 widely spreading, narrowly lanceolate, 6-8 mm. long ; follicles widely divergent. 



Gravelly or rocky soils, Transition Zone; Siskiyou Mountains, southern Oregon, to Monterey County in the 

 Coast Ranges and to Tulare County in the Sierra Nevada, California. June-Aug. 



3. Sedum Douglasii Hook. Douglas' Stonecrop. Fig. 2214. 



Sedum Douglasii Hook. Fl. Bor. Amer. 1 : 228. 1832. 

 Sedum unifiorum Howell, Fl. N.W. Amer. 213. 1898. 



Perennial with slender rootstocks, the stems simple or branched, 1-3 dm. high. Leaves 

 narrowly lanceolate or lanceolate-subulate, tapering from the base, 5-20 mm. long, flat, drying 

 thin and scarious with a keel-like midrib, those of the sterile shoots crowded, those of the flower- 

 ing branches usually with leafy buds in the axils ; flowers in a few-forked cyme or sometimes 

 solitary ; petals yellow, spreading, narrowly lanceolate, 6-12 mm. long ; follicles widely spreading. 



Gravelly or rocky slopes, Transition and Canadian Zones; British Columbia to Montana and California. 

 In the Pacific States rather rare in Willamette Valley and Coast Ranges, Oregon, more common in eastern Wash- 

 ington, Oregon, northeastern California, and the Siskiyou Mountains, southern Oregon. May-Aug. 



Sedum ciliosum Howell, Fl. N.W. Amer. 214. 1898. Distinguished from 5*. Douglasii chiefly by the 

 leaves, at least the lower ones ciliate on the margins and by the acuminate calyx-lobes about half as long as the 

 petals. Known only from the original collection in the Coast Ranges near Roseburg, Oregon. 



4. Sedum niveum Davidson. Davidson's Stonecrop. Fig. 2215. 



Sedum niveum Davidson, Bull. S. Calif. Acad. 20: 53. 1921. 



Prostrate glabrous perennial, the fleshy stems rhizomatous, 1 or more dm. long, giving rise 

 to short ascending branches. Leaves numerous, imbricate on the sterile branches, more distant 

 on the floral ones, 5-7 mm. long, oblong-obovate to obovate, fleshy; flowers solitary or in few- 

 flowered cymes ; calyx-lobes lanceolate, 3 mm. long ; petals white with a pinkish midvein, lanceo- 

 late, 6-7 mm. long ; carpels erect. 



Shaded rock ledges, mainly Canadian Zone; San Bernardino Mountains, southern California. June-July. 



5. Sedum spathulifolium Hook. Pacific Stonecrop. Fig. 2216. 



Sedum spathulifolium Hook. Fl. Bor. Amer. 1: 227. 1832. 

 Gormania anomala Britt. Bull. N.Y. Bot. Gard. 3: 30. 1903. 

 Sedum yosemitense Britt. Bull. N.Y. Bot. Gard. 3: 44. 1903. 

 Sedum anomalum Britt. N. Amer. Fl. 22: 72. 1905. 

 Sedum pruinosum Britt. N. Amer. Fl. 22: 72. 1905. 



Perennial with slender rootstocks, and propagating by lateral offshoots, flowering stems 

 ascending, simple or branched, 5-15 cm. high. Basal leaves broadly spatulate, 10-25 mm. long, 

 flat, more or less glaucous, cyme with several forks, 5-8 cm. broad ; flowers on short stout 

 pedicels ; calyx-lobes narrowly lanceolate ; petals yellow, narrowly lanceolate, spreading, 8-10 

 mm. long, carpels slightly spreading. 



Rocky ledges and slopes, mainly Transition Zone; British Columbia to southern California in both the Coast 

 Ranges and in the Cascades and Sierra Nevada. May-July. 



6. Sedum divergens S. Wats. Cascade Stonecrop. Fig. 2217. 



Sedum divergens S. Wats. Proc. Amer. Acad. 17: 372. 1882. 



Perennial with slender branching rootstocks, the flowering stems erect or ascending, usually 

 decumbent at base, 5-12 cm. high, simple or branching. Leaves, at least those of the sterile 

 shoots, opposite, obovate to broadly so or the upper spatulate, 5-8 mm. long, rounded or obtuse 

 at apex, glabrous ; cyme 5 cm. broad or less, rather compact ; flowers on short, stout pedicels ; 

 calyx-lobes triangular ; petals yellow, narrowly lanceolate, spreading, 5-6 mm. long ; follicles 

 widely divergent. 



Rocky alpine slopes, Boreal Zones; Cascade Mountains, from British Columbia to Mount Hood, Oregon. 

 July-Sept. 



7. Sedum Leibergii Britt. Leiberg's Stonecrop. Fig. 2218. 



Sedum divaricatum S. Wats. Proc. Amer. Acad. 17: 372. 1882. Not Ait. 1789. 

 Sedum Leibergii Britt. N. Amer. Fl. 22: 73. 1905. 



Glabrous perennial with slender rootstocks, the flowering stems simple, erect, 5-15 cm. high. 



Basal leaves mostly oblanceolate to narrowly obovate, narrowed to a slender elongated base ; 



stem leaves alternate, the lower oblanceolate, the upper oblong and sessile ; cyme few- forked, 



2-10 cm. broad ; flowers very short-pedicelled ; calyx-lobes narrowly lanceolate ; petals yellow, 



narrowly lanceolate, acuminate, 6-9 mm. long ; follicles widely divergent. 



Rocky banks, often growing with moss. Transition Zone; Columbia Basin species extending from the Colum- 

 bia Gorge eastward through southeastern Washington and northeastern Oregon to adjacent Idaho. May-July. 



