Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Garden Cornflower - Centaurea cyanus

Exotic Species (not native to Montana)

Global Rank: GNR
State Rank: SNA

Agency Status
MNPS Threat Rank:
C-value: 1

External Links

General Description
Annual. Stems erect, branched, 20–60 cm. Herbage sparingly tomentose. Leaves petiolate below; blades linear-oblanceolate, 2–10 cm long, entire or with few linear lobes. Inflorescence corymbiform; heads solitary on branch tips. Involucres campanulate, 12–16 mm high; outer phyllaries ovate, green with a white to brown, scarious fringe at the tip; inner lanceolate with a blunt, white-fringed tip. Disk flowers 25 to 35, blue; the outer enlarged, resembling 5-lobed rays; inner corollas 11–15 mm long. Achenes 4–6 mm long; pappus bristles in 2 series (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Introduced ornamental sparingly escaped throughout most of N. America (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 0

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


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


Login Logout
Citation for data on this website:
Garden Cornflower — Centaurea cyanus.  Montana Field Guide.  .  Retrieved on , from