Cornus canadensis

Cornus canadensis L.

Common Names

Bunchberry dogwood, Canadian bunchberry

Languages: English

Overview

General Description

Herblike shrubs, perennial, rhizomatous, 10–20 cm tall. Rhizomes creeping, slender. Vertical stems slender, unbranched. Leaves opposite, often appearing as a whorl of 6 at terminal node due to compression of internodes, 2 larger and 4 smaller; smaller ones developing from axillary buds of larger leaves; leaves at lower nodes rudimentary; petiole 2–3 mm long; leaf blade obovate to ± diamond-shaped, 3.5-4.8 cm long, 1.5-2.5 cm wide, papery, veins 2 or 3, base cuneate, margin entire, apex shortly acuminate. Inflorescences compound cymes, terminal; bracts white, broadly ovate, 0.8-1.2 cm long, 0.5-1.1 cm wide, with 7 parallel veins. Flowers white, ca. 2 mm in diameter. Calyx tube obovate, ca. 1 mm, densely pubescent with grayish white appressed trichomes; teeth higher than disk. Petals reflexed, creamy white, ovate-lanceolate, 1.5–2 mm. Stamens ca. 1 mm; anthers yellowish white, narrowly ovoid. Style ca. 1 mm, glabrous. Fruit red at maturity, globose, ca. 5 mm in diameter; stones ellipsoid-ovoid.

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

Description

Genetics

There are some reports for the chromosomal data of Cornus canadensis. All counts are 2n = 22, 44 (Brain and Denford, 1979; Plante, 1995; Gervais et al., 1999).

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

Ecology and Distribution

Cyclicity

Flowering from July to August; fruiting from August to September.

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

Distribution

Cornus canadensis is occurring in S Jilin (Changbai Shan), Japan, Korea, N Myanmar, Russia (Far East), North America.

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 Canadensis is closely related to C. unalaschkensis.

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

Habitat

Growing in montane coniferous forests, margins of woods, old tree stumps, mossy areas, open and moist habitats; ca. 1200 m.

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

Taxonomy

  • Chamaepericlymenum canadense (L.) Aschers. & Graebn. (synonym)
  • Cornella canadensis (L.) Rydb. (synonym)

References

Brain, J. F., & Denford K. E. (1979).  The herbaceous members of the genus Cornus in Northwest North America. Botaniska Notiser. 132,
Fan, C. Z., & Xiang Q. Y. (2001).  Phylogenetic relationships within Cornus (Cornaceae) based on 26S rDNA sequences. American Journal of Botany. 88,
Gervais, C., Trahan R., & Gagnon J. (1999).  American Journal of Botany. Newslett. Int. Organ. Pl. Biosyst. (Oslo). 30,
Plante, S. (1995).  IOPB chromosome data 10. International Organization of Plant Biosystematists Newsletter. 25,