Sorbus sitchensis

Taxobox
name = Sitka Mountain-ash


image_caption="Sorbus sitchensis" fall foliage and fruit
regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
ordo = Rosales
familia = Rosaceae
genus = "Sorbus"
subgenus = "Sorbus"
species = "S. sitchensis"
binomial = "Sorbus sitchensis"
binomial_authority = M.Roem.

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

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.cite book | last = Pojar | first = Jim | coauthors = Andy MacKinnon | title = Plants of the Pacific Northwest | publisher = Lone Pine Publishing | pages = 71 | date = 1994 | id = ISBN 1-55105-042-0]

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.

References