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Marin Knotweed
Polygonum marinense
About Marin Knotweed (Polygonum marinense) 0 Nurseries Carry This Plant Polygonum marinense is a rare North American species of flowering plants in the buckwheat family known by the common name Marin knotweed. It is endemic to California, where it is known from just a few locations north and east of San Francisco Bay. The taxonomy of the plant is uncertain. It has been suggested that the species may be native to the Mediterranean, and that the California specimens may actually be introduced. If, however, it is a true Bay Area endemic, the plant is rare and threatened by habitat destruction and disturbance. It is a resident of salt marsh and other wet coastal habitat.
Plant Description
Plant Type
Plant Type
Annual herb

0.49 - 1.3 ft tall

Wildlife Supported

Landscaping Information
Natural Setting
Annual Precipitation: 21.1" - 40.8", Summer Precipitation: 0.21" - 0.42", Coldest Month: 46.4" - 51.0", Hottest Month: 61.0" - 70.3", Humidity: 0.34" - 15.36", Elevation: 2" - 139"

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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