Cornus canadensis

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Cornus canadensis
Growing at Elfin Lakes, British Columbia

Secure  (NatureServe)[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Cornales
Family: Cornaceae
Genus: Cornus
Subgenus:
Cornus subg. Arctocrania
Species:
C. canadensis
Binomial name
Cornus canadensis

Cornus canadensis is a

perennial
growing to about 20 centimetres (8 inches) tall.

Description

Cornus canadensis is a slow-growing

leaves
are shiny dark green and arranged oppositely on the stem, clustered with six leaves that often seem to be in a whorl because the internodes are compressed. The leaves consist of two types: two larger and four smaller leaves; the smaller ones develop from the axillary buds of the larger leaves. The leaves have petioles 2 to 3 millimetres (3⁄32 to 1⁄8 in) in length and leaf blades that are obovate. The blades have entire margins and are 3.5 to 4.8 cm (1+1⁄2 to 2 in) long and 1.5 to 2.5 cm (1⁄2 to 1 in) wide, with 2–3 veins, cuneate shaped bases and abruptly acuminate apexes. In autumn, the leaves have red-tinted veins and turn completely red.

Flowers

Mature and immature flowers, Bonnechere Provincial Park, Ontario

In late spring to midsummer, white flowers are produced that are 2 cm (25⁄32 inch) in diameter with reflexed

appressed trichomes. Stamens are very short, being 1 mm long. The anthers are yellowish white in color, narrowly ovoid in shape. The styles are 1 mm long and glabrous. Plants are for the most part self-sterile and dependent on pollinators for sexual reproduction. Pollinators include bumblebees, solitary bees, beeflies, and syrphid flies.[6] The fruits look like berries but are drupes
.

Pollen release

Each flower has highly elastic petals that flip backward, releasing springy filaments that are cocked underneath the petals. The filaments snap upward flinging pollen out of containers hinged to the filaments. The stamens accelerate at a rate of 24,000 m/s2.[7] The motion, which can be triggered by pollinators, takes place in less than half a millisecond. The bunchberry has one of the fastest plant actions found so far requiring a camera capable of shooting 10,000 frames per second to catch the action.[8][9]

Fruit

Immature flowers
Fruit

The drupes are green, globose in shape, turning bright red at maturity in late summer; each fruit is 5 mm in diameter and contains typically one or two ellipsoid-ovoid shaped stones. The fruits come into season in late summer.[10] The large seeds within are somewhat hard and crunchy.

Taxonomy

While distinctive as a species itself, the generic placement of these plants has differed in various botanical treatments. When the genus Cornus is taken broadly, as done here, this species is Cornus canadensis, and is included in the subgenus Arctocrania.[11] However, if Cornus is treated in a narrower sense, excluding this species, it can instead be classified as Chamaepericlymenum canadense or as Cornella canadensis.[12][13]

Where C. canadensis, a forest species, and Cornus suecica, a bog species, grow near each other in their overlapping ranges in Alaska, Labrador, and Greenland, they can hybridize by cross-pollination, producing plants with intermediate characteristics.[14][15]

Distribution and habitat

Its native distribution includes Japan, North Korea, northeastern China (Jilin Province), the Russian Far East, the northern United States, Colorado, New Mexico, Canada and Greenland.[3]

Cornus canadensis is a

coniferous forests, where it is found growing along the margins of moist woods, on old tree stumps, in mossy areas, and among other open and moist habitats.[16][17]

Ecology

Birds are the main dispersal agents of the seeds, feeding on the fruit during their fall migration. In Alaska, bunchberry is an important forage plant for mule deer, black-tailed deer and moose, which eat it throughout the growing season.[18]

Uses

It is used as

acidic soil.[19] The wildflower author Claude A. Barr was of the opinion that the crimson berries are even more attractive than the flowers.[20]

The fruits are edible raw but have little flavor.[10][4] The pulp does not easily separate from the seeds. The berries can be cooked, strained, and combined with other fruits or used for pudding.[21]

Culture

Meghan Markle's wedding veil, which included the distinctive flora of each Commonwealth country.[22]

References

  1. ^ "Cornus Canadensis". NatureServe Explorer. NatureServe. Retrieved 2018-04-01.[permanent dead link]
  2. ISBN 978-1405332965
    .
  3. ^ a b "Cornus canadensis". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture.
  4. ^
    OCLC 3541725
    .
  5. ^ Murrell, Zack E.; Poindexter, Derick B. (2016). "Cornus canadensis". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 12. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  6. ^ Barrett, Spencer C.; Helenurm, Kaius. 1987. The reproductive biology of boreal forest herbs. I. Breeding systems and pollination. Canadian Journal of Botany. 65: 2036-2046.
  7. OCLC 190965401
    .
  8. S2CID 4412631
    .
  9. doi:10.26786/1920-7603(2015)16
    . Retrieved 20 December 2021.
  10. ^ a b Lyons, C. P. (1956). Trees, Shrubs and Flowers to Know in Washington (1st ed.). Canada: J. M. Dent & Sons. pp. 111, 196.
  11. ^ Murrell, Zack E.; Poindexter, Derick B. (2016). "Cornus subg. Arctocrania". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 12. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  12. ^ Eyde, R. H. 1987. The case for keeping Cornus in the broad Linnaean sense. Systematic Botany. 12(4): 505-518.
  13. ^ Eyde, Richard H. 1988. Comprehending Cornus: puzzles and progress in the systematics of the dogwoods. Botanical Review. 54(3): 233-351.
  14. ^ Neiland, Bonita J. 1971. The forest-bog complex of southeast Alaska. Vegetatio. 22: 1-64.
  15. ^ Murrell, Zack E. 1994. Dwarf dogwoods: Intermediacy and the morphological landscape. Systematic Botany 19: 539-556.
  16. ^ "Cornus canadensis - Plant Finder". www.missouribotanicalgarden.org.
  17. ^ "Lady Bird Johnson Wildflower Center - The University of Texas at Austin". www.wildflower.org.
  18. ^ Hanley, Thomas A.; Cates, Rex G.; Van Horne, Beatrice; McKendrick, Jay D. 1987. Forest stand-age related differences in apparent nutritional quality of forage for deer in southeastern Alaska. In: Provenza, Frederick D.; Flinders, Jerran T.; McArthur, E. Durant, compilers. Proceedings--symposium on plant-herbivore interactions; 1985 August 7–9; Snowbird, UT. Gen. Tech. Rep. INT-222. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Research Station: 9-17.
  19. ^ "Cornus canadensis". RHS. Retrieved 7 September 2021.
  20. ISBN 0-8166-1127-0
    .
  21. OCLC 244766414
    .
  22. ^ "The Wedding Dress, Bridesmaids' Dresses and Page Boys' Uniforms". 2018-05-19.

External links

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