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Montana Field Guide

Montana Field Guides

Douglas's Hawthorn - Crataegus douglasii
Other Names:  Crataegus columbiana [misapplied], Crataegus okennonii


Global Rank: G5
State Rank: S4?

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

External Links






 
General Description
Shrubs 4–6 m high. Stems tan when young becoming gray; thorns 15–25 mm long, straight to curved. Leaf blades obovate, 3–7 cm long, twice serrate and shallowly lobed above, appressed-hairy, glabrous and glaucous beneath. Inflorescence 5- to 25-flowered, glabrous. Flowers: hypanthium glabrous externally; sepals 2–4 mm long; petals 5–8 mm long: stamens 10; styles 3 or 4. Pome 6–12 mm wide, purple to black, glabrous at maturity (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
AK to SK, south to CA, ID, WY and SD (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 13

(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

References
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Citation for data on this website:
Douglas's Hawthorn — Crataegus douglasii.  Montana Field Guide.  .  Retrieved on , from