Cornus sessilis
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Cornus sessilis fruit cluster |
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| Scientific name | ||||||||||||
| Cornus sessilis | ||||||||||||
| Torr. ex Durand |
Cornus sessilis is a plant from the genus of dogwood ( Cornus ) within the family of Dogwood (Cornaceae). This Cornelian cherry grows as a large shrub and is found in western North America. There it is called "blackfruit dogwood" or "miner's dogwood".
description
Cornus sessilis grows as a deciduous, large shrub or small tree and reaches a height of 5 meters. The bark of young branches is green, that of the older branches is gray or yellowish brown. The opposite leaves are short stalked. The elliptical leaf blade is pointed at the ends and about 5 to 10 centimeters long. There are short, rough hairs on the underside of the leaf, and longer, soft hairs in the axils of the leaf veins. The leaves turn dark red in autumn.
The inflorescences are, as well, brownish-yellow in other Kornelkirschen of four, one centimeter bracts surround that drop during the flowering period. Below these bracts are two vegetative buds, including two bracts that envelop the entire bud complex. The flowers are close together in heads. They open before the leaves shoot. Four sepals are fused cup-shaped. The four free petals are yellowish.
Stone fruits develop which are greenish-white in color when they are not ripe , and turn yellow and red to a shiny purple-black during the ripening process.
The number of chromosomes is 2n = 20.
distribution
This type of cornel is common in the mountains of northwest California. There it rises to altitudes of 1500 meters and grows mainly on the banks of small streams. Various conifers dominate these locations: coastal redwood ( Sequoia sempervirens ), Douglas fir ( Pseudotsuga menziesii ) and yellow pine ( Pinus ponderosa ).
Systematics
Within the genus Cornus , this species is classified in the subgenus Cornus , colloquially called Cornelian cherries. It is not particularly closely related to any of the other Cornelian cherry species, but probably represents the basal species in this group. The following description of the relationships between the Cornelian cherries results:
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Individual evidence
- ↑ Cornus sessilis at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ↑ Qiu-Yun (Jenny) Xiang, Steve R. Manchester, David T. Thomas, Wenheng Zhang: Phylogeny, Biogeography, and Molecular Dating of Cornelian Cherries (Cornus, Cornaceae). Tracking Tertiary Plant Migration . In: evolution . tape 59 , no. 8 , 2005, ISSN 0014-3820 , p. 1685-1700 .
literature
- JC Hickman (Ed.): The Jepson Manual. Identification key to California plant families, taxonomic treatment of Saxifragaceae, introductory information. University of California at Berkeley. Jepson Herbarium and Library, Berkley 1989, 1993.
- Paul Cappiello, Don Shadow: Dogwoods . Timber Press, Portland Or 2005, p. 70. ISBN 0-88192-679-5
