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Woollyhead Parsnip
Sphenosciadium capitellatum
About Woollyhead Parsnip (Sphenosciadium capitellatum) 0 Nurseries Carry This Plant Sphenosciadium is a monotypic genus of flowering plants in the carrot family containing the single species Sphenosciadium capitellatum, which is known by the common names woollyhead parsnip, ranger's buttons, button parsley, and swamp white heads. The plant is native to western North America from Idaho through Nevada, Oregon, and California into Baja California. It grows in moist habitat types, such as creeksides and meadows. It is included in Toxic Plants of North America (Burrows & Tyrl, 2001). Ranger's buttons plants are quite similar to the other large Umbelliferae that share similar habitats: Sierra angelica and cow parsnip, but each has a very differently shaped leaf, and the other two have umbellets with quite distinct flowers, in contrast to the tight balls on ranger's buttons.
Plant Description
Plant Type
Plant Type
Perennial herb

Wildlife Supported

Butterflies & moths hosted ( 1 likely * ) SHOW ALL

Landscaping Information
Full Sun

Sunset Zones
Sunset Zones?
1, 2, 6, 7, 14, 15, 16

Natural Setting
Site Type
Site Type

Annual Precipitation: 5.2" - 102.7", Summer Precipitation: 0.23" - 3.85", Coldest Month: 10.8" - 49.0", Hottest Month: 34.1" - 77.4", Humidity: 0.45" - 30.15", Elevation: 985" - 14460"

Alternative Names
Common Names: Button Parsley, Grayswamp Whiteheads, Ranger's Buttons

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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