Cornus controversa Hemsley
- genus Cornus L.
Trees 3-17 m tall. Bark dark gray or yellowish gray, smooth; branches ± horizontal; branches of current year purplish, later greenish, glabrous or pubescent; older branches greenish, with conspicuous semicircular leaf scars and rounded lenticels; winter buds purplish, ovoid or conical, 3-8 mm, glabrous, with several alternate overlapping scales. Leaf blade broadly ovate or broadly elliptic-ovate, 5-13 cm long, 3-9 cm wide, abaxially light or grayish green, sparsely pubescent with appressed trichomes, papillate, veins 6 or 7, abaxially raised and slightly purplish, base subrounded, apex acute or acuminate. Corymbose cymes terminal, 5-14 cm in diameter, pubescent with appressed trichomes. Flowers 8-9 mm in diameter; buds nearly orbicular, shortly pedicellate. Calyx teeth ca. 0.5 mm, taller than disk. Petals oblong-lanceolate, 3-4.5 mm long, 1-1.6 mm wide. Stamens longer than petals; filaments whitish, 4-5 mm. Style 2-3 mm, glabrous. Fruit purplish red or bluish black, globose, 6-7 mm in diameter; stones globose, 5-6 mm in diameer, inconspicuously 8-ribbed.
The chromosomal number of Cornus controversa is 2n = 20 (Oginuma et al., 1994).
Ecology and Distribution
Flowering from May to June; fruiting from July to September.
Cornus controversa is occurring in Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Liaoning, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Xizang, Yunnan, Zhejiang of China, Bhutan, N India, Japan, Korea, Myanmar, Nepal.
The phylogenetic relationships of Cornus has been inferred using nuclear gene 26S rDNA (Fan and Xiang, 2001). The 26S rDNA sequence data suggested that Cornus controversa is closely related to C. walteri.
Growing in broad-leaved or mixed broad-leaved and coniferous forests; 200-2600 m.
An oil is extracted from the fruits of Cornus controversa for used in the lubricating and soap industry. The large, conspicuous, white inflorescences, layered branching pattern, and pagodalike shape of the tree make it a good garden ornamental. The leaves are used in folk remedies to relieve pain and to reduce swelling.
- Bothrocaryum controversum (Hemsley) Pojarkova (synonym)
- Cornus brachypoda Miquel (synonym)
- Cornus controversa var. angustifolia Wangerin (synonym)
- Cornus sanguinea Thunberg (synonym)
- Swida controversa (Hemsley) Soják (synonym)