Spotted Joepye-weed - Eupatorium maculatum
Eupatoriadelphus maculatus, Eutrochium maculatum
State Rank Reason (see State Rank above)
Widespread species known in Montana from a few occurrences in the south-central part of the state on a variety of ownerships. Four of the occurrences are moderate to large-sized populations.
- Details on Status Ranking and Review
Spotted Joepye-weed (Eupatorium maculatum) Conservation Status Review
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Fibrous-rooted perennial. Stems erect, 50–150 cm, simple, purplish. Herbage puberulent, glandular above. Leaves cauline, short-petiolate, simple, in whorls of 3 or 4; blades lanceolate, 6–15 cm long, serrate. Inflorescence corymbiform, flat-topped, terminal or in upper leaf axils. Heads discoid; involucre tubular, 6–9 mm high; phyllaries imbricate in 3 to 5 series, white to purplish, ovate to oblanceolate, glabrous; receptacle convex, naked. Disk flowers perfect, tubular, 9 to 22, purple; corolla 4–6 mm long; style branches clavate. Achenes obconic, 5-angled, 3–5 mm long, glandular; pappus 1 series of capillary bristles (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Our plants are variety bruneri
Flowering in August.
BC to QC south to AZ. NM, TN and NC (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Moist meadows, springs, margins of spring-fed streams, and swamp thickets in the valleys and on the plains.
Ecological Systems Associated with this Species
- 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.