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      Photo by  Brother Alfred Brousseau @ USDA-NRCS 
       PLANTS Database  ©St. Mary's College of California














Petasites frigidus var. palmatus- Western, Sweet, or Palmate coltsfoot


Range: Native to the PNW, occurring mostly west of the Cascades.  Found from Alaska to California, east to Michigan and Massachusetts. (Spear Cooke 1997)


Climate, elevation: low to middle elevations.(Pojar 1994)


Local occurrence: Common and widespread.(Pojar 1994)  Especially common on sliding bluffs above Puget Sound. (Jacobson 2001)


Habitat preferences:  Moist to wet forest, thickets, swamps, openings, clearings. (Pojar 1994)  Full sun to part shade. (Jacobson 2001)


Plant strategy type/successional stage: Rhizomatous perennial herb. (Spear Cooke 1997)


Associated species: Not specified.


May be collected as: Seed (Baskin 2002)


Collection restrictions or guidelines: Not specified


Seed germination:  Germination occurs at 22 C,  seeds are non dormant (Baskin 2002)


Seed life: Not specified.


Recommended seed storage conditions:    Not specified.


Propagation recommendations:  Not specified.


Soil or medium requirements:  Not specified.


Installation form:  Not specified.


Recommended planting density: Not specified.


Care requirements after installed:  Not specified.


Normal rate of growth or spread:  Not specified.


Sources cited:


Baskin, Carol C.; Baskin, Jerry M. 2002. Propagation protocol for production of container Petasites frigidus (L.) Fries plants; University of Kentucky, Lexington, Kentucky. In: Native Plant Network. URL: http://www.nativeplantnetwork.org (accessed 17 May 2004). Moscow (ID): University of Idaho, College of Natural Resources, Forest Research Nursery.


Jacobson, A.L. (2001).  Wild Plants of Greater Seattle. Aurthur Lee Jacobson, Seattle WA


Pojar, J., MacKinnon, A. (1994).  Plants of the Pacific Northwest Coast. Lone Pine Publishing Vancouver British Columbia.


Spear Cooke, S. (1997). A Field Guide to the Common Wetland Plants of Western Washington & Northern Oregon.  Seattle Audubon Society. Seattle, WA.

USDA-NRCS. 2004. The PLANTS Database (http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.




Data compiled by:  Jennifer Boardman, 05/17/2004