Tag Archives: Potentilla

Potentilla multijuga Lehm.

Ballona Cinquefoil (Potentilla multijuga)  

The Ballona Cinquefoil, sometimes also named the Lost Cinquefoil, was described in 1849, it was collected somewhere in or near the city Los Angeles, Califonia, USA but was obviously never found again since.

Some botanists considered this form a misidentified Wedgeleaf Horkelia (Horkelia cuneata Lindl.), whose leaves are almost identical, however, it appears to be indeed a distinct taxon and is now apparently extinct.

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References:  

[1] Per Axel Rydberg: A monograph of the North American Potentilleae. Lancaster, Pa., Press of the New Era Print. Co. 1898.

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Depiction from: ‘Per Axel Rydberg: A monograph of the North American Potentilleae. Lancaster, Pa., Press of the New Era Print. Co. 1898.’

(public domain)

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edited: 20.09.2020

Potentilla uliginosa B. C. Johnst. & Ertter

Cunningham Marsh Cinquefoil (Potentilla uliginosa)  

The Cunningham Marsh Cinquefoil, formerly included in another species, Hickman’s Cinquefoil (Potentilla hickmanii Eastw.) (see photo), was described as a distinct species only in 2010.

This species was apparently restricted to Cunningham Marsh in Sonoma County, California, USA but appears to be extinct now. [1]

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References:  

[1] Barry C. Johnston; Barbara Ertter: Potentilla uliginosa (Rosaceae: Rosoideae) a new presumed extinct species from Sonoma County, California. Journal of the Botanical Research Institute of Texas 4(1): 13-18. 2010

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Hickman’s Cinquefoil (Potentilla hickmanii Eastw.)

Photo: John Game

(under creative commons license (2.0))
http://creativecommons.org/licenses/by/2.0

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edited: 20.09.2020