Spiraea L.

Spiraea

Greek speiraia, the classical name for plants used as garlands or wreaths.

Deciduous shrubs. Leaves alternate and simple with margins lobed, toothed or entire; stipules usually absent. Flowers bisexual or unisexual, in clusters. Sepals and petals 5. Stamens mostly more than 15. Ovary superior. Carpels 5. Fruit a cluster of dehiscent follicles, each containing 2-10 seeds. Grown mostly as ornamental shrubs, often with arching branches bearing clusters of small white or occasionally pink flowers.

About 90 northern temperate species from Eurasia and N America extending to Mexico and the Himalaya.

Seed and cuttings or occasionally by layers.

Leaf margins mostly either toothed or lobed, rarely entire; fruit a dehiscent follicle.

Source: Spencer, R. (2002). Rosaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 3. Flowering plants. Dicotyledons. Part 2. The identification of garden and cultivated plants. University of New South Wales Press.

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Cultivars of hybrid origin

Spiraea 'Arguta'

A rounded, dense shrub to 2 m or so tall with fine, arching, downy branches. Leaves oblanceolate, to about 4 cm long, 1.5 cm wide, entire or with a few teeth towards the tip, downy-haired below. Flowers prolific on the upper side of the shoots, white, in groups of 4-8; spring. [s. _arguta Zab.] a seedling of the cross s. _multiflora _ s. thunbergii.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Rosanae
order      Rosales
family       Rosaceae
Higher taxa
Subordinate taxa
species         Spiraea cantoniensis Lour.
species         Spiraea japonica L.f.
species         Spiraea nipponica Maxim.
species         Spiraea prunifolia Siebold & Zucc.
species         Spiraea ×vanhouttei (Briot) Zabel