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Montana Field Guide

Montana Field Guides

Simpson's Hedgehog Cactus - Pediocactus simpsonii


Global Rank: G5?
State Rank: S4
* (see State Rank Reason below)

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

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State Rank Reason (see State Rank above)
Though rare to uncommon in Montana, where it is known from scattered locations within arid habitats in the southwest portion of the state, its long-term viability does not appear to be at risk. Additional data on population levels and trends should be collected to corroborate its status.
 
General Description
Stems unsegmented, solitary or clumped, 7–12 cm high, buried in the soil, globose with spirally arranged tubercles. Spines 20 to 40 per areole; the central 3 to 10, straight, yellow to reddish, 6–12 mm long; marginal spines smaller, whitish. Flowers 10–15 mm long, borne near tip of tubercles; tepals yellow-green to magenta, the outer with greenish midstripe. Fruits narrow-globose, 6–8 mm long, green-tinged with red. Our plants are var. simpsonii (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety simpsonii.

Species Range
Present
 


Range Comments
Lower montane in Beaverhead County; ID, MT south to NV, AZ and NM (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 21

(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
Fine-textured, often stony soil of steppe, grasslands; valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Simpson's Hedgehog Cactus — Pediocactus simpsonii.  Montana Field Guide.  .  Retrieved on , from