Sorbus sitchensis

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Sitka Mountain-ash
Sorbus sitchensis fall foliage and fruit
Sorbus sitchensis fall foliage and fruit
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Rosales
Family: Rosaceae
Subfamily: Maloideae
Genus: Sorbus
Subgenus: Sorbus
Species: S. sitchensis
Binomial name
Sorbus sitchensis
M. Roemer

Sorbus sitchensis, also known as Sitka Mountain-ash, is a small shrub of the western United States.

[edit] Description

A multistemed shrub, it is indigenous to the Pacific Coast of the North America from Alaska to northern California and eastward to Idaho and western Montana.[1]

The otherwise similar Sorbus scopulina has yellow-green sharp-pointed leaflets that are sharply pointed over most of their length.,

  • Winter buds: Not sticky with rusty hairs.
  • Leaves: Alternate, compound, six to ten inches long, Leaflets seven to ten, blue-green, lanceolate or long oval, with rounded tip, toothed usually from the middle to the end. In autumn they turn yellow, orange and red. Stipules leaf-like, caducous.
  • Flowers: After the leaves are full grown. White, small, 80 or fewer, borne in flat compound cymes three or four inches across.
  • Fruit: Berry-like pome, globular, one-quarter of an inch across, bright red, borne in cymous clusters.

[edit] References

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  1. ^ Pojar, Jim; Andy MacKinnon (1994). Plants of the Pacific Northwest. Lone Pine Publishing, 71. ISBN 1-55105-042-0. 
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