Stachyurus is a genus of deciduous shrubs and small trees in the family Stachyuraceae — a small family it constitutes alone — placed in the order Crossosomatales. The genus is native to the Himalayas and eastern Asia, with species distributed from the Himalayan foothills through China and Japan.
The plants are distinctive in their flowering habit: long, pendent racemes of small, 4-petalled flowers open on bare, leafless branches in late winter to early spring, well before the new foliage appears. This early bloom makes several species highly regarded as ornamental garden shrubs in temperate regions worldwide. The leaves, which emerge after flowering, have serrate (toothed) margins.
Chemically, species in the genus are notable for containing ellagitannins including pendunculagin, casuarictin, strictinin, casuarinin, and casuariin.
Two species are especially prominent in cultivation: Stachyurus praecox, native to Japan, and the slightly later-flowering Stachyurus chinensis, from China. Both are grown for their graceful winter flowers in temperate gardens. The genus comprises approximately 10 recognised species.
Etymology
The name Stachyurus derives from the Greek stachys (spike or ear of grain) and oura (tail), referring to the long, tail-like pendent flower racemes characteristic of the genus.
Distribution
Stachyurus is native to the Himalayas and eastern Asia, with individual species ranging across Japan, China (including Yunnan), and the Himalayan region. The genus is not native to Europe or the Americas, where it is grown only as a cultivated ornamental.
Cultivation
Stachyurus praecox and Stachyurus chinensis are both widely cultivated as ornamental shrubs in temperate gardens, prized for producing pendent racemes of flowers on bare branches in late winter to early spring before any other foliage appears. They perform well in sheltered positions and well-drained soils in cool-temperate climates.
