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Montana Field Guide

Montana Field Guides

Low Arctic Cinquefoil - Potentilla hyparctica
Other Names:  Potentilla nana, Potentilla flabellifolia var. emarginata

Species of Concern

Global Rank: G4G5
State Rank: S2
* (see State Rank Reason below)

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

External Links






State Rank Reason (see State Rank above)
Rare in Montana, where it is currently only from a couple collections from the Beartooth Mtns. The remote, high-elevation habitat should greatly minimize the potential for any negative impacts to the viability of the species in the state. Accurate estimates of population levels are lacking.
 
General Description
Low arctic cinquefoil is a perennial with stems 5-20 cm tall that arise from a branched rootstock covered by old reddish-brown leaf bases. The basal leaves have long petioles and blades with three coarsely-toothed leaflets; the stems have a few small, sessile leaves or leaf-like bracts and 1-3 flowers borne on short stalks. Foliage is loosely covered by long hairs that remain on the plant as it ages. The flowers are 1.5-2 cm in diameter and have a green 5 lobed calyx with small appendages on each lobe, 5 yellow heart-shaped petals, and many stamens and pistils. Each pistil has a single slender style attached at or near the top of the ovary.

Phenology
Flowering in late July-early August.

Diagnostic Characteristics
Distinguished from other perennial species of Potentillain Montana by having basal leaves that are strictly trifoliate, and foliage that is sparsely long hairy rather than white wooly beneath.

Species Range
Present
 


Range Comments
Alaska and the Yukon south to British Columbia and Alberta, east to Labrador. In Wyoming, known only from the N Wind River Range in Sublette and Fremont counties.


Summary of Observations Submitted for Montana
Number of Observations: 2

(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
Moist turf in the alpine zone.

Ecological Systems Associated with this Species

References
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Citation for data on this website:
Low Arctic Cinquefoil — Potentilla hyparctica.  Montana Field Guide.  .  Retrieved on , from