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Montana Field Guide

Montana Field Guides

Naked-stemmed Evening-primrose - Camissonia scapoidea
Other Names:  Oenothera scapoidea


Global Rank: G5
State Rank: S4

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

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General Description
Taprooted annual. Stems erect, branched at the base, 5–20 cm. Herbage glabrate. Leaves long-petiolate, mostly basal; the blade ovate, 1–5 cm long with sinuate margins, sometimes with a few small lobes isolated below. Inflorescence an elongating raceme. Flowers: hypanthium 2–4 mm long; sepals 2–4 mm long; petals 3–5 mm long, basally, minutely red-spotted; stigma discoid. Capsule pedicellate, spreading-erect, clavate, 1–2 cm long, straight to slightly curved, glabrous (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Wagner et al. (2007, Syst. Bot. Monogr. Vol. 83) treat this as Cyclismia scapoidea (Torr. & A. Gray) Small.

Species Range
Present
 


Range Comments
WA to MT south to AZ, NM, CO. Known from Carbon and Chouteau counties (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 45

(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 soil of open slopes, sagebrush steppe; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Naked-stemmed Evening-primrose — Camissonia scapoidea.  Montana Field Guide.  .  Retrieved on , from