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Montana Field Guide

Montana Field Guides

Sitka Mountain-ash - Sorbus sitchensis


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 5

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General Description
Shrub. Stems 1–3 m, purplish; buds reddish-hairy. Leaves glabrate to sparsely red-hairy below with 7 to 11, narrowly oblong leaflets 2–6 cm long. Inflorescence hemispheric to pyramidal, sparsely reddish-hairy. Flowers: calyx glabrous; sepals 1–2 mm long; petals 4–5 mm long. Pome red, glaucous, 8–10 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are subspecies sitchensis.

Species Range
Present
 


Range Comments
AK south to CA, OR and MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 4

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Open forest, wet meadows, often near streams, lakes; subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Sitka Mountain-ash — Sorbus sitchensis.  Montana Field Guide.  .  Retrieved on , from