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Montana Field Guide

Montana Field Guides

Blue-button - Knautia arvensis

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
Taprooted perennial. Stems erect, branched above, 30–80 cm. Herbage hirsute. Basal leaves petiolate; blades oblanceolate, crenate, 3–15 cm long. Stem leaves oblanceolate, 4–20 cm long, deeply pinnately lobed; the lobes linear-lanceolate. Heads hemispheric, 1–3 cm across; involucral bracts lanceolate, 5–12 mm long; receptacle bracts absent. Flowers: calyx hirsute with 8 to 12 aristate sepals 2–4 mm long; corolla 4-lobed, light purple, glabrous to sparsely hairy, 6–8 mm long; lobes 1–3 mm long; stigma shallowly lobed; stamens barely exserted. Achene conical, 5–6 mm long, hirsute (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced to northern U.S., adjacent Canada; native to Europe (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat

References
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Citation for data on this website:
Blue-button — Knautia arvensis.  Montana Field Guide.  .  Retrieved on , from