64 NEW SYLVA. 



lix and capsules grey tomentose Canada, Lake 

 Cham plain, Saranac and Oquago Mts. a small 

 ramose shrub pedal, flowers incarnate, leaves 

 only half inch long. All the above sp. agree in 

 nothing but the tomentose leaves beneath, to 

 deem them all varieties would be preposterous, 

 as no character including them all could be fram- 

 ed ; but they afford like the 8 blended sp. of S. 

 salicifolia, fine illustrations of real natural spe- 

 cific deviations, similar to those of the Genus 

 Azalea ! now admitted as species. 



641. SPIREA SALICIFOLIA L. Dec. &c. Quite 

 smooth, branches elongate terete yellowish, 

 leaves subsessile broadly lanceolate equaly ser- 

 rate, acute at both ends concolor, panicle ra- 

 cemose compound base foliose, bracts oblong. 

 In North Europe, Sibiria and Origon, my 

 specimen is simple 2 feet long, leaves 3 inches 

 long one wide, flowers white peduncled crowd- 

 ed. Five other American sp. have been blend- 

 ed with this by all the botanists, which altho' 

 deviations perhaps are totally distinct from this: 

 I have compared them all carefully and ascer* 

 tainfcd excellent peculiar characters in each, 

 they only agree in having thin smooth leaves 

 and the branches of the panicle nearly corym- 

 bose. Var. Sibirica Pallas fl. Ross. t. 21. dif- 

 fer branches yellowish, leaves unequaly serrate 

 panicle lax not foliose, flowers large incarnate. 

 Perhaps a peculiar species Sp. Sibirica Raf. 



642. SPIREA FLEXUOSA Raf. salicif. of many 

 Amer. hot. alba? Erhart. Mg. Quite smooth, 

 branches flexuose angular redish, leaves petio- 

 late oblong lanceol. deeply serrate, base entire 

 cuneate pale beneath, panicle racemose base fo- 

 liose, no bracts Mts. Alleghanies and hills 

 from Canada to Virginia, pretty shrub 2 to 4 



