Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Ecology

Habitat

Comments: Perennial wetland, Cunningham Marsh in Sonoma County, California, that is acidic and nutrient poor (Johnson and Errter 2010).

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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: NH - Possibly Extirpated

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NatureServe Conservation Status

Rounded Global Status Rank: GH - Possibly Extinct

Reasons: Potentilla uliginosa was described in 2010, from material previously recorded as P. hickmanii, another rare plant. Both Potentillas are endemic to California, with 'uliginosa' being known only from the Cunningham Marsh, a perennial wetland in southern Sonoma County. P. uliginosa was described from mateial collected in the 1940s, and has been searched for since, however, no extant material was found. It is possible that this species is extinct, however, there is hope that living plants will either be found in northwestern California or that seeds from a persistent seed bank will germinate (Johnson and Errter 2010).

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Names and Taxonomy

Taxonomy

Comments: Described in 2010, Potentilla uliginosa was split from P. hickmanii, based on stem and leaf character differences (Johnson and Ertter).

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