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Montana Field Guide

Montana Field Guides

Mountain Starthistle - Centaurea montana

Exotic Species (not native to Montana)

Global Rank: GNR
State Rank: SNA

Agency Status
MNPS Threat Rank:
C-value: 0

External Links

General Description
Perennials, 30-70 cm tall. Stems simple or sparingly branched, sparsely tomentose. Leaves mostly 7-18 mm long, 1-4 mm wide, entire or nearly so. Inflorescence corymbiform or heads solitary; peduncles 1.5-7 cm long; involucres 2-2.5 chm high and as broad or broader; bracts imbricate, lanceolate to ovate-triangular with prominent blackish pectinate-lacerate margins extending to the base or nearly so, lacking a definte terminal appendage (except sometimes the inner); outer flowers blue, enlarged and subradiate; inner ones purplish; anthers blackish-purple; achenes short-hairy (pappus 1-1.5 mm long) (adapted from: Welsh et al., 1993, A Utah Flora, 2nd ed.).

Range Comments
Introduced as ornamental; scattered across northern parts of North America, less so in Great Plains and southern tier states and Southeast (Kartesz in prep. 2012).

Summary of Observations Submitted for Montana
Number of Observations: 0

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

Persisting and sometimes spreading from cultivation.

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Citation for data on this website:
Mountain Starthistle — Centaurea montana.  Montana Field Guide.  .  Retrieved on , from