Montia howellii is a species of flowering plant in the family Montiaceae known by the common names Howell's miner's lettuce and Howell's montia. It is native to western North America from British Columbia to northern California, where it grows in moist to wet habitat, including and meadows. It sometimes grows in shallow standing water such as puddles. The species is known from fossilized seeds recovered from sediments of the Pleistocene Tomales Formation and from a small paleoflora at San Bruno.Mason, Herbert L. 1932. Pleistocene Flora from San Bruno. Carnegie Institute of Washington Publication No. 415, pages 25-44Mason, Herbert L. 1934. Pleistocene Flora from the Tomales Formation. Carnegie Institute of Washington Publication No. 415, pages 81-179. Further, Daniel Axelrod discussed Montia howellii as one of the biogeographically significant species comprising the Millerton Palaeoflora at Tomales.Axelrod, D. I. 1983. New Pleistocene Conifer Records, Coastal California. University of California Publications Geological Sciences Volume 127. Berkeley: University of California Press, 31 pp
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