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Montana Field Guide

Montana Field Guides

Alderleaf Buckthorn - Rhamnus alnifolia


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

External Links






 
General Description
Dioecious shrub. Stems erect or ascending, 50–200 cm; twigs gray. Leaves alternate, 3–12 cm long, glandular-serrate, puberulent on the veins below, petioles 5–15 mm long. Inflorescence few axillary, pedicellate flowers. Flowers functionally unisexual, 5-merous; sepals 1–2 mm long; petals lacking; stigmas 3. Drupe 3-seeded, 5–9 mm wide, poisonous (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
BC to NL south to CA, WY, NE, OH and NJ (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 184

(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
Wet forest openings or forming thickets along the margins of marshes, swamps, lakes, fens; valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Alderleaf Buckthorn — Rhamnus alnifolia.  Montana Field Guide.  .  Retrieved on , from