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Montana Field Guide

Montana Field Guides

Bitter Dock - Rumex obtusifolius

Exotic Species (not native to Montana)

Global Rank: GNR
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 1

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General Description
Puberulent perennial. Stems erect, simple, 60–100 cm. Leaf blades ovate, cordate, the lower 10–25 cm long. Inflorescence a leafy-bracted panicle with ascending, interrupted, spike-like branches. Flowers perfect; outer tepals 2–3 mm long. Fruit 3–5 cm long; inner tepals triangular with basally toothed margins; a callosity on 1 to 2 tepals. Achenes brown, 2–3 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced into most of N. America; native to Europe (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat
Disturbed banks and terraces of rivers, streams; 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:
Bitter Dock — Rumex obtusifolius.  Montana Field Guide.  .  Retrieved on , from