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Montana Field Guides

Maximillian Sunflower - Helianthus maximiliani

Native Species

Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

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General Description
Rhizomatous perennial with thickened roots. Stems erect, usually simple, 45–200 cm. Herbage hispid-strigose, glandular. Leaves alternate; blades entire, narrowly lanceolate, acuminate, 7–15 cm long. Involucres 12–25 mm across; phyllaries lanceolate, long-acuminate, strigose, glandular, ciliate, 6–15 mm long. Ray ligules 10–25 mm long. Disk corollas 5–7 mm long. Achenes 3–4 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Throughout most of U.S., southern Canada and Mexico (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 28

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

Recency

 

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



Habitat
Moist to wet meadows, thickets, often along streams, ponds; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Additional ReferencesLegend:   View Online Publication
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    • Hale, K.M. 2007. Investigations of the West Nile virus transmission cycle at Medicine Lake National Wildlife Refuge, Montana, 2005-2006. M.Sc. Thesis. Bozeman, MT: Montana State University. 74 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Rundquist, V.M. 1973. Avian ecology on stock ponds in two vegetational types in north-central Montana. Ph.D. Dissertation. Bozeman, MT: Montana State University. 112 p.
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Citation for data on this website:
Maximillian Sunflower — Helianthus maximiliani.  Montana Field Guide.  .  Retrieved on , from