Croton siraki Siebold & Zucc.
Excoecaria japonica (Siebold & Zucc.) Müll.Arg.
Neoshirakia atrobadiomaculata (F.P.Metcalf) Esser & P.T.Li
Sapium atrobadiomaculatum F.P.Metcalf
Sapium japonicum (Siebold & Zucc.) Pax & K.Hoffm.
Shirakia japonica (Siebold & Zucc.) Hurus.
Stillingia japonica Siebold & Zucc.
Triadica japonica (Siebold & Zucc.) Baill.
Neoshirakia japonica is a deciduous shrub or small tree that can grow up to 8 metres tall.
The plant is sometimes harvested from the wild for local use as a food. It is grown as an ornamental in gardens[
The sap is poisonous[
E. Asia - central and southern China, central and southern Japan, Korea.
Thin woods in the lowlands and mountains of C. and S. Japan[
]. Moist forests at elevations from 100 - 400 metres[
|Cultivation Status||Ornamental, Wild
Neoshirakia japonica is found in the warm temperate to subtropical regions of southern and eastern China, where it can be found in hardiness zones from 7 - 10. It is not very hardy in regions of the Temperate zone with cold winters, though it is known to tolerate several degrees of frost and has been grown successfully against a sunny wall in southern parts of Britain[
]. A specimen seen growing outdoors at Hilliers Arboretum in Hampshire, England - but in the shade of other trees - was carrying a heavy crop of unripe seeds in September 1994[
Succeeds in a sunny position in any well-drained fertile soil[
]. Requires the protection of a south or south-west facing wall when grown in areas at the limits of its hardiness[
Seed - cooked[
]. Some caution is advised, since related species such as Triadica sebiferum have a somewhat toxic oil in the seed[
Seed - do not cold stratify the seed since this can lead to secondary dormancy. Sown in mid spring in a warm greenhouse, it usually germinates within 4 weeks[
]. Prick out the seedlings into individual pots when they are large enough to handle. Overwinter in a greenhouse for at least their first 2 winters and plant out in late spring.
Cuttings of half-ripe wood, mid summer in a frame.