OF NORTH AMEKICA. 69 



^56. SpiREA(Ch.) LALRicA Raf. chamedrif. 

 Var. Pallas t. 15. differs by leaves elliptic pu- 

 bescent nearly entire, crenate above, tonientose 

 beneath— Daurian Mts. of Sibiria, nearer toSp, 

 douglassi than the Sp. versifolia, but llovvers 

 not paniculate. 



657. Spirea (Ch.) ulmifolia Scop, t. 22. 

 W. P. Sm. chamedrif. Amman Lind. b. reg. 

 1222! Smooth, branches slender flexuose an- 

 gular, leaves petiolate ovate laciniate serrate 

 acute, base entire subacute, flowers terminal 

 corymbose crowded, pedicels filiform often with 

 a subulate bract— Mts. of Europe and Sibiria, 

 my specimen is an original one of Scopoli from 

 Carniolia, and agrees perfectly with the figure 

 of Lindley with mistaken name : totaly differ- 

 ent from Sp. chamedrif. leaves and flowers lar- 

 ger. 



658. Spirea (Ch.) betulifolta Pallas fl. t. 

 16. not Pursh. Smooth, shrubby branches te- 

 rete redish, leaves subsessile ovate rounded la- 

 ciniate serrate, yellow beneath, flowers termi- 

 nal corymbose lax — Sibiria and New Sibiria ? 

 flowers white. 



659. Spirea (Ch.] ostryfolia Raf betuli- 

 folia Pursh not Pallas. Suffruticose, quite 

 smooth, shoots terete redish, leaves petiolate 

 acute at both ends ovatoblong laciniate ser- 

 rate except at the base, apex often obliqual, 

 glaucous beneath, corymb, pauciflore simple fo- 

 liose crowded — Alleghany Mts. of Virginia 

 found there 1825, intermediate between the 

 last and the next, semipedal, leaves 2 inches 

 long quite thin, flowers white. Var. pumila,4 

 inches high flexuose few leaves the lowest large 

 duplicate serrate, corymb glomerate, Wasioto 

 Mts. 



