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Montana Field Guide

Montana Field Guides

Western St. John's-wort - Hypericum scouleri
Other Names:  Hypericum formosum


Global Rank: G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 7

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General Description
Rhizomatous and stoloniferous. Stems erect, 5–60 cm. Leaves broadly elliptic, 5–30 mm long, black-dotted on the margins. Flowers: petals 6–12 mm long with black-dotted margins; sepals ovate with rounded tips and amber veins, 3–4 mm long. Capsule 5–7 mm long with yellow to brown seeds (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

We have subspecies scouleri and nortoniae (M.E. Jones) J. Gillett.

Species Range
Present
 


Range Comments
Alberta, Montana, South to New Mexico; west to Pacific coast.

Summary of Observations Submitted for Montana
Number of Observations: 8

(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, often shallow soil of meadows, streambanks, ledges; valleys to alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Western St. John's-wort — Hypericum scouleri.  Montana Field Guide.  .  Retrieved on , from