OF NORTH AMERICA. 
65 
feet high, leaves only two inches long, flowers 
small white estivah 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 Qrigon 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. paucijlora^le aves 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. Spireaovata 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. enurn. 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- 
enberg to 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, 
9 
