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Montana Field Guide

Montana Field Guides

Spotted Water-hemlock - Cicuta maculata

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Native Species

Global Rank: G5
State Rank: S4
C-value: 3

Agency Status


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General Description
Stems erect, 30–100 cm. Leaves basal and cauline; leaflets lanceolate, serrate, 2–7 cm long; tertiary venation enclosing sections of leaf ca. as long as wide, reticulations usually completely closed. Umbels terminal and axillary; rays 1–5 cm long. Mericarps 2–4 mm long; dorsal ribs as wide or wider than the darkened intervals (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety angustifolia Hook.

Species Range
Montana Range Range Descriptions


Range Comments
Throughout North America (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 23

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



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

Moist meadows, woodlands, streambanks; plains, valleys (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus impatiens (Colla and Dumesh 2010).

  • Literature Cited AboveLegend:   View Online Publication
    • Colla, S.R. and S. Dumesh. 2010. The bumble bees of southern Ontario: notes on natural history and distribution. Journal of the Entomological Society of Ontario 141:39-68.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Heywood, V.H. 1971. The biology and chemistry of the Umbelliferae. Academic Press, New York.
    • Sater, S. 2022. The insects of Sevenmile Creek, a pictorial guide to their diversity and ecology. Undergraduate Thesis. Helena, MT: Carroll College. 242 p.
  • Web Search Engines for Articles on "Spotted Water-hemlock"
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Citation for data on this website:
Spotted Water-hemlock — Cicuta maculata.  Montana Field Guide.  .  Retrieved on , from