- Scientific Name: Tetradium ruticarpum (A.Juss.) T.G.Hartley
- Ref: Gard. Bull. Singapore 34:116. 1981
- Synonyms:
- Ampacus ruticarpa (A.Juss.) Kuntze
- Cyclocarpus japonicus Jungh.
- Euodia bodinieri Dode
- E. compacta Hand.-Mazz.
- E. hirsutifolia Hayata
- E. officinalis Dode
- E. rugosa Rehder & E.H.Wilson
- E. ruticarpa (A.Juss.) Benth.
- Chinese Common Name: 吴茱萸 Wú zhūyú
- Japanese Common Name: ゴシュユ [呉茱萸] goshuyu
- Family: Rutaceae
- Genus: Tetradium
- Distribution: Forests, thickets, open places; 100-3000 m. Anhui, Fujian, S Gansu, Guangdong, Guangxi, Guizhou, Hebei, S Henan, Hubei, Hunan, S Jiangsu, Jiangxi, S Shaanxi, Sichuan, Yunnan, Zhejiang [Bhutan, NE India, Myanmar, Nepal].
Shrubs or trees, to 9 m tall. Leaves 15-40 cm, (3 or)5-13(or 15)-foliolate; leaflet blades elliptic to ovate or sometimes lanceolate, oblanceolate, or obovate, 4.5-17 × 2-8 cm, abaxially rarely slightly glaucous and not papillate, secondary veins 9-17 on each side of midvein, reticulate veinlets abaxially ± inconspicuous and ± loose, base in lateral leaflets obtuse to narrowly cuneate or sometimes rounded to cuneate or rarely attenuate, margin entire or irregularly crenulate, apex acuminate. Inflorescences 2.5-18 cm. Flowers (4 or)5-merous. Sepals 0.5-1.2 mm. Petals green, yellow, or white but drying brown to whitish, 3-5 mm, outside glabrous or with sparse short trichomes, inside nearly glabrous to villous. Ovary glabrous or with sparse trichomes; ovules 2 per carpel, collateral or subcollateral. Fruit (including abortive carpels, if any) usually 5-carpelled; follicles subglobose, 3.5-6 mm, glabrous or sometimes with sparse trichomes, apex not beaked; endocarp glabrous. Seeds 1 per follicle but paired with an abortive seed, ovoid or sometimes ellipsoid or subglobose, 3.5-5.5 mm, attached in dehisced follicle to axile strip of pergamentaceous pericarp tissue; seed coat with thick inner layer of dense black sclerenchyma and spongy outer layer bounded externally by a shiny black pellicle. Fl. Apr-Jun, fr. Aug-Nov. (Flora of China)
