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Montana Field Guide

Montana Field Guides

Tufted Evening-primrose - Oenothera caespitosa
Other Names:  Oenothera cespitosa


Global Rank: G5
State Rank: S5

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

External Links






 
General Description
Acaulescent perennial with a simple or branched caudex surmounting a taproot. Herbage strigose. Leaves oblanceolate, 2–15 cm long with entire to serrate margins. Flowers white, opening at night, turning pink the following morning; hypanthium 2–8 cm long; sepals 1–3 cm long; petals 15–35 mm long; stigma lobes 3–6 mm long. Capsule erect, narrowly ovoid to ellipsoid, 12–40 mm long, woody, vaguely 4-angled, usually bumpy, sometimes pedicellate, often partly below ground (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are subspecies caespitosa.

Species Range
Present
 


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

Summary of Observations Submitted for Montana
Number of Observations: 70

(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
Sandy or clay, usually sparsely-vegetated soil of open slopes, badlands, sandhills, roadsides; plains, valleys to subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Tufted Evening-primrose — Oenothera caespitosa.  Montana Field Guide.  .  Retrieved on , from