Part 1, 1905] CRASSULACEAE 57 



1. Rhodiola rosea L. Sp. PI. 1035. 1753. 



Sedum roseum Scop. Fl. Cam. ed. 2. 1 : 326. 1772. 

 Sedum Rhodiola DC. PI. Grasses pi. 143. 1805. 



. Perennial by a rose-scented woody root, glabrous and somewhat glaucous, 1-4 dm. 

 high. Leaves sessile, oval, oblanceolate or obovate, dentate or entire, 1-5 cm. long, the 

 lower ones smaller ; C3rme dense, 1-5 cm. broad ; flowers yellowish-green, mostly dioecious, 

 5-8 mm, broad; sepals oblong, narrower and shorter than the blunt, flat, linear-oblong 

 petals ; follicles 2-6, 8-10 mm. long, their short, blimtish tips spreading. 



Type locality : Mountains of I^aplaiid, Austria, Switzerland and Bngland. 



Distribution : Newfoundland and Greenland to Alaska, south to Maine ; two isolated stations 

 in eastern Pennsylvania. Also in Europe. 



Illustrations: DC. PL Grasses//. 143 ; Fl. Deutsch. ed. 6: pi. 2637 ; Engl. Bot. pi. 508; 

 Benth. Handb. Br. Fl. /. 358; Britt. & Brown, 111. Fl. /. 18,10> 



2. Rhodiola neo-mexicana Britton, Bull. N. Y. Bot. Gard. 3 : 38. 1903. 



Stems stout, very leafy, 1-2.5 dm. high. Leaves linear-oblong, narrowed at both ends, 

 entire, acute or obtusish, 2-3 cm. long, 3-7 mm. wide, or the lower proportionately shorter 

 and broader and some of them serrulate ; cymes terminal, dense, the staminate ones 2-3 cm. 

 broad, the pistillate ones smaller; pedicels shorter than the petals or equaling them ; petals 

 linear-lanceolate, cucullate at the apex, longer than the linear calyx-segments ; filaments 

 one-half longer than the petals. 



Type locality : White Mountain Peak, Lincoln County, New Mexico, at 3,500 m. 

 Distribution : Known only from the type locality. 



3. Rhodiola alaskana Rose, Bull. N. Y. Bot. Gard. 3 : 39. 1903. 



Resembling R. integrifolia but usually taller and more slender, often 20 cm. high, 

 usually quite pale and appearing glaucous in herbarium specimens. Leaves oblanceolate, 

 acute, 2-2.5 cm. long, strongly toothed in the upper third, drying very thin ; petals purp- 

 lish, obtuse ; carpels 4-6 mm. long, gradually tapering into a slender style 1-1.5 cm. long. 



' Type locality : Misty Harbor, Nagai Island, Alaska. 

 Distribution : Coast of southern Alaska. 



4. Rhodiola integrifolia Raf. Atl. Jour. 1 : 146. 1832. 



Sedum rhodioloides Raf. loc. cil. 1832. 



Sedum Rhodiola Torr. Ann. Lye. N. Y. 2 : 206. 1827. Not 5. Rhodiola DC. 1805. 



Sedum frigidum Rydb. Bull. Torrey Club 28 : 282. 1901. 



Dioecious ; rootstock fleshy. Stems low, usually less than 1 dm. high ; leaves obovate 

 to oblong-obovate, sessile, 1-1.5 cm. long, 5-7 mm. wide, dentate above the middle or 

 entire, acute; cyme dense, usually dark-purple ; flowers usually 5-merous ; calyx- segments 

 lanceolate, acute, 1.5-2 mm. long; petals oblanceolate to oblong, acute, about 3 mm. long, 

 dark-purple or rarely greenish-purple, those of the pistillate flowers shorter and less acute ; 

 filaments purple, about one-third longer than the petals; follicles 3-5 mm. long, oblong, 

 the beak about 0.5 mm. long, divergent or recurved. 



Type locality : On the Rocky Mountains. 



Distribution : High mountains of Colorado, Nevada, and California to Alaska. 



5. Rhodiola polygama (Rydb.) Britton & Rose, Bull. N. Y. Bot. 



Gard. 3 : 39. 1903. 



Sedum poly gamum Rydb. Bull. Torrey Club 28 : 283. 1901. 



Rootstock thick, fleshy. Stems rather stout, 1-3 dm. tall ; leaves obovate to oblanceo- 

 late, sessile, acute, entire or minutely denticulate, 1.5-2.5 cm. long; cyme dense, dark- 

 purple ; flowers polygamo-dioecious ; calyx-segments lanceolate, acute, 2 mm. long ; petals 

 oblanceolate, 3 mm. long, dark-purple ; filaments about one-half longer than the petals, 

 purple, abruptly narrowed above ; follicles 6-8 mm. long, the ascending or spreading beak 

 about 1 mm. long. 



Type locality : West Spanish Peak, Colorado. 

 Distribution : Mountains of Colorado. 



