NEILLIA OPULIFOLIA (_syn Spiraea opulifolia_).--Nine Bark. North
America, 1690. A hardy shrub, nearly allied to Spiraea. It produces a
profusion of umbel-like corymbs of pretty white flowers, that are
succeeded by curious swollen membraneous purplish fruit. N. opulifolia
aurea is worthy of culture, it being of free growth and distinct from
the parent plant.
N. THYRSIFLORA, Nepaul, 1850, would seem to be quite as hardy as N.
opulifolia, and is of more evergreen habit. The leaves are doubly
serrated and three lobed, and cordate-ovate. Flowers white in spicate,
thyrsoid racemes, and produced rather sparsely.