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Montana Field Guide

Montana Field Guides

Hooker's Evening-primrose - Oenothera elata
Other Names:  Oenothera biennis, Oenothera elata ssp. hirsutissima

Image Copyright and Usage Information
Status Under Review

Global Rank: G5
State Rank: SU

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 3

External Links

 
General Description
Taprooted biennial or short-lived perennial. Stems erect, often branched at the base, 30–100 cm. Herbage strigose, hirsute, glandular. Leaves basal and cauline, lanceolate to oblanceolate; the basal 5–15 cm, entire to weakly dentate; cauline leaves reduced upward. Flowers light yellow; hypanthium 2–4 cm long, pubescent; sepals 2–4 cm long; petals 2–4 cm long, aging orange; stigma lobes 4–5 mm long. Capsule ascending, linear, 2–4 cm long, 4-angled, strigose (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
WA to MT south to CA, AZ, NM and TX (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 1

(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
Streambanks, roadsides; valleys; collected once in Gallatin County (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Hooker's Evening-primrose — Oenothera elata.  Montana Field Guide.  .  Retrieved on , from