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

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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).

Habitat
Persisting and sometimes spreading from cultivation.

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