OF NORTH AMERICA, 65 



feet high, leaves only two inches long, flowers 

 small white estival. If it is the sp. alba of Er- 

 hart it is also found in Sibiria. 



643. SPIREA AMENA Raf. 1808. Quite smooth 

 branches fuscate terete below angular above, 

 leaves imbricate sessile oblong or elliptical 

 sharply serrate,some obovate below, panicle ra- 

 cemose ovate naked. From New Jersey to 

 Kentucky, perhaps Origon and Sibiria, as I have 

 received it also as Sibirian, similar to the last 

 but distinct by stem flowers larger incarnate,no 

 petiols and leaves smaller commonly uncial. 

 Var. pauciflora, leaves oblong lanceolate or 

 narrow elliptic serrulate, panicle capitate al- 

 most simple with few large pink flowers. Sibi- 

 ria, this is Sp. salicifolia var. b. Pallas fl. ross. 

 tab, 22. branches flexuose. 



644. SPIREA ov ATA Raf. Quite smooth, shoots 

 simple virgate terete rugose purplish, leaves 

 subsessile ovate acute imbricate deeply serrate 

 or jagged, lower obovate, panicle racemose 

 glomerate, base not foliose, some oblong bracts 

 Mts. Alleghanies, Wasioto and Apalachian, 

 stems simple 1 or 2 feet high, only woody at 

 base, leaves uncial or smaller, flowers white. 



645. SPIREA CARPINIFOLIA W. enum. Wat- 

 son dendr. 66, Loudun Cycl. Quite smooth, 

 leaves ovate elliptic acute at both ends coarse- 

 ly serrate, panicle racemose spreading Said to 

 be from North America, flowers white, not 

 seen, nearest to my Sp. ovata, stated by Muh- 

 lenbergto be the same as my Sp. corymbosa* 

 but that is not paniculate ; therefore a doubtful 

 species. 



646. SPIREA HETEROPHYLA Raf. Quite smooth 

 branches angular purplish, lower leaves round- 

 ed or lobed, medial obovate, upper elliptical, 



