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Montana Field Guide

Montana Field Guides

German Madwort - Asperugo procumbens
Other Names:  Madwort

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
MNPS Threat Rank:
C-value: 0

External Links

General Description
Weak-stemmed annual. Stems ascending, lax, 25–100 cm. Herbage hispid; stems retrorse-prickly. Leaves: the basal petiolate, oblanceolate to spatulate, 2–8 cm long, becoming smaller and sessile on the stem. Inflorescence of solitary or paired, axillary flowers. Flowers reflexed-pedicellate; calyx divided ca. halfway, becoming compressed and 1–2 cm across in fruit with 2 small teeth between each pair of lobes, veiny and prickly; corolla funnelform, blue, ca. 2 mm long, the lobes ca. 1 mm long; fornices apparent; stamens included; style short, unlobed. Nutlets ovate, minutely muricate, compressed, 2–3 mm long, hidden by the calyx; scar above midlength (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range


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

Observations in Montana Natural Heritage Program Database
Number of Observations: 94

(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)

Lawns, gardens, riparian thickets, vacant lots; valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).


  • Additional ReferencesLegend:   View Online Publication
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    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
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Citation for data on this website:
German Madwort — Asperugo procumbens.  Montana Field Guide.  .  Retrieved on , from