72 
NEW SYLVA. 
665. Spirea (Ch.) italica or reticulata 
Raf, hypericifolia Sm. and many Authors, type 
in Bocc. mus. t. 66. Quite smooth, branches 
angular purplish, leaves sessile cuneate entire 
obtuse concolor, beneath nerves reticulate, flow- 
ers in small pauciflore umbels sessile at the end 
of branchlets, calix venose, each segments ovate 
with 3 veins — Native of the hills of Umbria in 
Italy where discovered by Bocconi, and again 
by Sir James Smith see Rees Cycl. it has be- 
come common in gardens, where it is blended 
with the next, and botanists have been perplex- 
ed for its locality : hypericifolia having become 
equivocal ought to be changed as I propose. 
Leaves small semiuncial not glaucons nor tri- 
nerve, but slightly trinervate sometimes, umbels 
of 3 to 7 flowers, petals white obovate. 
666. Spirea (Ch.) virgata Raf. hypericifo- 
lia of Lin and many botanists, hyper, var. plu- 
kenetiana Dec. Hooker, Beck. Pluk. aim. 218. 
5 — Branches fuscate angular rugose virgate, 
leaves sessile cuneate obtuse or retuse, entire 
smooth above, pubescent and glaucous beneath, 
nerves with paralel branches not reticulate, um- 
bels pauciflore lateral subsessile foliose at base, 
pedicels angular, calix decangular at base, seg- 
ments uninerve.— This is the real American 
Species, so long deemed doubtful, native of bo- 
real America and New Sibiria, common in our 
gardens ; flowers vernal in white umbels almost 
sessile at first, but peduncled and foliose as the 
leaves unfold, these are small semiuncial nearly 
similar to the last in shape and size, but thick- 
er and quite different beneath, the calix is very 
peculiar by its 10 angles or nerves. Yar. hook - 
eriana Raf. Leaves smooth entire, umbels 
corymbose sessile, of N. W. America is proba- 
