Part 1, 1905] CRASSULACEAK 65 



set, but not closely imbricated, spreading, 'narrowly linear, projecting below the attach- 

 ment to the stem but not "clasping," glabrous, slightly glaucous, 6-15 mm. long; inflor- 

 escence cymose ; flowers short- pedicelled or subsessile ; sepals linear, slightly unequal, 

 quite distinct ; petals white or somewhat tinged with red, linear, acuminate, distinct, 3 

 mm, long ; carpels spreading in age. 



Type locality : Rio Blanco, Jalisco, Mexico. 

 Distribution: Jalisco. 



^ 



18. Sedum oxycoccoides Rose, Bull. N. Y. Bot. Gard. 3 : 40. 1903. 



Perennial by creeping fleshy rootstocks, with many slender branches arising from the 

 base ; glabrous throughout. Leaves numerous, linear, 8-15 mm. long ; flowers in small few- 

 branched cymes, sessile or sometimes short-pedicelled ; calyx-segments linear, leaf-like, 

 somewhat unequal, the longer ones as long as the petals ; petals deep-red, lanceolate, acumi- 

 nate, 10 mm. long, longer than the reddish stamens ; carpels free to base, spreading. 



Type locality : Santa Teresa, Tepic, Mexico. 

 Distribution : Known only from the type locality. 



19. Sedum diffusum S. Wats. Proc. Am. Acad. 25 : 148. 1890. 



Rootstock widely branched, fleshy; stem short, the slender branches spreading, 1.5 



dm. long or less, glabrous, very leafy. Leaves sessile or somewhat clasping, narrowly 



oblong, obtuse, 4-9 mm. long; flowers sessile in secund spikes at the ends of the branches, 



mostly longer than the bracts ; calyx- segments ovate, obtuse ; petals 4-6 mm. long, twice 



as long as the calyx, white, narrowly oblong, acute ; stamens very short ; follicles widely 



divergent, abruptly subulate- tipped. 



Type locality : Dry limestone ledges in the Sierra de la Silla, near Monterey, Mexico. 

 Distribution : Known only from the type locality. 



20. Sedum guatemalense Hemsl. Diag. PL Nov. 1 : 11. 1878. 



Perennial, procumbent, rooting at the joints ; branches woody, tuberculately rough- 

 ened. Leaves numerous, terete, obtuse, 6-7 mm. long, glabrous; inflorescence a short 

 compact cyme ; calyx-segments leaf-like, half as long as the petals ; petals reddish-yellow, 

 7 mm. long, mucronate on the back below the apex ; carpels widely spreading when 

 mature. 



Type locality : Above Calderas, Guatemala. 



Distribution : Guatemala. 



21. Sedum mexicanum Britton, Bull. N. Y. Bot. Gard. 1 : 257. 1899. 



Perennial, herbaceous ; stems brittle, weak, spreading, 1-2 dm. long. Leaves linear, 

 sessile, compressed, tapering to a blunt tip, scattered, or those of sterile shoots and the lower 

 part of flowering ones opposite or verticillate, 8-20 mm. long, about 2 mm. wide ; branches 

 of the cyme mostly 2-forked, 4-8 cm. long ; flowers sessile, close together ; bracts longer 

 than the similar calyx-segments; petals golden-yellow, oblong, acute, concave, widely 

 spreading, tapering into a short claw, 5-6 mm. long, 1.5 mm. wide, a little longer than the 

 two outer calyx-segments, twice as long as the three inner ones ; filaments nearly as long as 

 the petals ; styles subulate. 



Type locality : Raised from seeds collected near the City of Mexico. 

 Distribution : Mexico. 



22. Sedum stenopetalum Pursh, Fl. Am. Sept. 324. 1814. 



Sedum coerulescens Haw. Phil. Mag. 1825 : 174. According to Ind. Kew. 



Sedum lanceolatum Torr. Ann. I^yc. N, Y. 2 : 205. 1827. 



?5^£^MW5M6£/az^a^/ww Haw. Phil. Mag. 1831: 414. ,^ ^ ^^ ^ „ , ^^ _. __, 



Sedum stenopetalum forma rubrolineatum Cockerell, Bull. Torrey Club 18 : 169. 1891. 



^ Perennial, tufted, glabrous; flowering branches 8-18 cm. high. Leaves alternate, 

 crowded but scarcely imbricated, except on the sterile shoots, sessile, linear, 6-16 mm. 

 long, entire; cyme 3-7-forked, compact; flowers niostly short-pedicelled, 8-10 mm. broad; 



