Search Field Guide
Advanced Search
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).

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

References
Login Logout
Montana Fish, Wildlife & Parks

Take us with you!

Look for this PDF icon at the top of each page as you search and browse.  You can download select species by searching or when you're on a Taxa page like Class, Order, and Family.

Here's some links if you want to download a whole group.

Mammals
Birds
Reptiles
Amphibians
Fish
Invertebrates
Butterflies / Moths
Dragonflies / Damselflies
Ferns and allies
Conifers
Flowering Plants (Dicots)
Flowering Plants (Monocots)
Bryophytes
Lichens
Ecological Systems
Noxious Weeds

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