Hansen's Northwest Native Plant Database


Sorbus sitchensis (Sitka Mountain Ash)

Kingdom

: 

 Plantae – Plants

Subkingdom

: 

 Tracheobionta – Vascular plants

Superdivision

: 

 Spermatophyta – Seed plants

Division

: 

 Magnoliophyta – Flowering plants

Class

: 

 Magnoliopsida – Dicotyledons

Subclass

: 

 Rosidae

Order

: 

 Rosales

Family

: 

 Rosaceae – Rose family

Genus

: 

 Sorbus L. – mountain ash

Species

: 

 Sorbus sitchensis M. Roem. – western mountain ash

A small shrub, the Sitka Mountain Ash is found across western North America and is more often seen on the coast than S. scopulina.

Growing only to 3-10,’ it forms multiple stems.

The fine foliage is composed of 7-11 leaflets along a leaf axis and they put on a spectacular display of orange and red in autumn.

In spring, clusters of creamy white flowers form, followed by glossy red berry-like fruit, very attractive to birds.

Found from Alaska to northern California and east into the Yukon and Montana (USDA 3-10), s. sitchensis prefers moist, rich soil and several hours of full sun.

Photo below right courtesy of Walter Siegmund.

  
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