|Specimen at the Morton Arboretum|
Picrasma quassioides (picrasma; Chinese: 苦樹 ku shu, Japanese: ニガキ nigaki "bitterwood"; also India quassia, quassia wood, shurni, quassia-wood, or quassiawood; syn. P. ailanthioides) is a species of Picrasma native to temperate regions of southern Asia, from the northeast of Pakistan east along the Himalaya and through southern, central and eastern China to Taiwan and Japan.
It is a deciduous shrub or small tree growing to 10–15 m (rarely 20 m) tall with a trunk up to 50 cm diameter. The bark is smooth and dark grey-brown. The leaves are 15–40 cm long, pinnate, with 7–15 leaflets 2.5–10 cm long and 1.5–4.5 cm broad, with a coarsely and irregularly toothed margin. The flowers are green to yellow-green with four or five sepals and petals, produced in cymes 8–15 cm long in mid to late spring. The fruit is an ovoid to globose red to black drupe 6–7 mm diameter.
Cultivation and uses
- Flora of Pakistan: Picrasma quassioides
- Flora of China (draft): Simaroubaceae
- Rokko mountain chain guide of trees: Picrasma quassioides (in Japanese; google translation)
- This page incorporates text translated from the Japanese Wikipedia page ニガキ
- Rushforth, K. (1999). Trees of Britain and Europe. Collins ISBN 0-00-220013-9.