Cornus controversa

Cornus controversa Hemsley

Languages: English

Overview

General Description

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.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Description

Genetics

The chromosomal number of Cornus controversa is 2n = 20 (Oginuma et al., 1994).

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Ecology and Distribution

Cyclicity

Flowering from May to June; fruiting from July to September.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Distribution

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.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Evolution

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.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Habitat

Growing in broad-leaved or mixed broad-leaved and coniferous forests; 200-2600 m.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Relevance

Uses

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.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Taxonomy

  • Bothrocaryum controversum (Hemsley) Pojarkova (synonym)
  • Cornus brachypoda Miquel (synonym)
  • Cornus controversa var. angustifolia Wangerin (synonym)
  • Cornus sanguinea Thunberg (synonym)
  • Swida controversa (Hemsley) Soják (synonym)

References

Fan, C. Z., & Xiang Q. Y. (2001).  Phylogenetic relationships within Cornus (Cornaceae) based on 26S rDNA sequences. American Journal of Botany. 88,
Oginuma, K., Gu Z., Yue Z., & Kondo K. (1994).  Chromosomes of some woody plants native to Yunnan, China. La Kromosomo. 73,