Coriaria nepalensis is a shrub of the genus Coriaria. It grows in the foot hills of Himalayas. It blooms in spring and has bright yellow flowers and red fruits in summer.
The plant is also known in English as masuri berry, tanner's tree, or mansur shrub. In Hindi it is known as masuri, makola, or masurya; and in Nepali as macchaino.
C. nepalensis is a shrub, growing around 1.5-2.5 metres tall. Flowers, yellow in colour, are in groups (inflorescences) and they are male or female but in the same plant. It blooms from February to May.
Fruits are red to dark purple when mature. They resemble berries, but they are actually achenes protected by enlarged and colored petals. The fruits are produced from May to August, but they are inedible as their seeds are poisonous.
The number of chromosomes the plant has is 40.
C. nepalensis grows on the southern slopes of the Himalayas (in Bhutan, India, Nepal, Pakistan), usually between 800 and 2500 metres.
This species was also found in southern China in mountain slopes at 200–3200 m high. It has been found in the Chinese provinces of Gansu, Guangxi, Guizhou, Henan, Hong Kong, Hubei, Hunan, Jiangsu, Shaanxi, Sichuan, Xizang, Yunnan.
Shrubs decumbent, 1.5-2.5 m tall, with horizontally spreading branches; branchlets tetragonous or narrowly 4-winged; young branches purplish red, puberulent or glabrescent; old branches purplish brown, with clearly prominent lenticels; bud scales purplish red, ovate or ovate-triangular, 1-2 mm, membranous, glabrous. Leaves opposite; petiole purple, 2-3 mm, puberulent, inflated into pad at base; leaf blade elliptic or broadly elliptic, 2.5-8 × 1.5-4 cm, papery to thinly leathery, both surfaces glabrous or puberulent on midrib and lateral veins, 3-veined to apex, veins raised abaxially, slightly impressed adaxially, base rounded, margin entire, apex acute. Inflorescences axillary. Male inflorescence 1.5-2.5 cm, densely multiflorous, flowers opening before leaves, rachis glandular puberulent; bracts and bracteoles ovate-orbicular, ca. 2.5 × 2 mm, membranous, translucent, concave, margins fringed denticulate upward; pedicel ca. 1 mm, glabrous; sepals ovate, 1.5-2 × 1-1.5 mm, margins translucent, fringed denticulate; petals ovate, very small, ca. 0.3 mm; filaments linear, ca. 1 mm, elongating in anthesis, 3-3.5 mm, anthers oblong, ca. 2 mm; sterile pistils small. Female inflorescence with flowers opening at same time that leaves appear, 4-6 cm, rachis glandular puberulent; bracts purplish, ca. 4 mm; pedicel 1.5-2.5 mm; sepals same as in male flower; petals small, fleshy; stamens short, filaments ca. 0.5 mm; carpels 5, compressed, auriculate, ca. 0.7 × 0.5 mm, styles ca. 1 mm, stigma purplish red. Fruit red to dark purple or purplish black when mature, subglobose, 4-6 mm in diam. Seeds ovoid-oblong. Fl. Feb-May, fr. May-Aug. 2n = 40.
Thickets, mountain slopes; 200-3200 m. Gansu, Guangxi, Guizhou, Henan, Hong Kong, Hubei, Hunan, Jiangsu, Shaanxi, Sichuan, Xizang, Yunnan [Bhutan, India, Kashmir, Myanmar, Nepal, Pakistan].