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Montana Field Guide

Montana Field Guides

Common Buckthorn - Rhamnus cathartica

Noxious Weed: Priority 2A
Exotic Species (not native to Montana)

Global Rank: GNR
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 0

External Links






 
General Description
Dioecious shrub or small tree. Stems erect, 2–6 m; twigs sometimes ending in thorns. Leaves opposite, 2–6 cm long, glandular-serrate, glabrous; petioles 1–2 cm long. Inflorescence several pedicellate flowers in leaf axils. Flowers functionally unisexual, 4-merous; sepals 1–3 mm long; petals erect; stigmas 4. Drupe 4-seeded, 5–7 mm across (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced ornamental escaped across much of N. America; native to Eurasia (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat
Fields, vacant lots, riparian corridors; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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