Taxon  Report   9546 
Heracleum maximum  Bartram
Common cowparsnip
Heracleum maximum
© 2006 Louis-M. Landry
Click on a photo to see it bigger.
Heracleum maximum
© 2008 Neal Kramer
Heracleum maximum
© 2004 Jeff Abbas
Heracleum maximum, a dicot, is a perennial herb that is native to California and is also found elsewhere in North America and beyond.

Interactive Distribution Map

Observation Hotline
(observation details + photos)

point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Heracleum maximum
© 2007 Matt Below
Family: APIACEAE  
Genus: Heracleum
Yellow Pine Forest, Red Fir Forest, Lodgepole Forest, Subalpine Forest, Foothill Woodland, Chaparral, Valley Grassland, (many plant communities)
Wetlands: Arid West: Occurs usually in wetlands, occasionally in non wetlands
Mountains, Valleys and Coast: Equally likely to occur in wetlands and non wetlands
Name Status:
Accepted by TJM2 + PLANTS
Alternate Names:
(according to)

TJM2: Heracleum sphondylium
PLANTS: Heracleum sphondylium ssp. montanum
PLANTS: Heracleum sphondylium var. lanatum
TJM2 + PLANTS: Heracleum lanatum
More information about  Heracleum maximum
Nursery / seed vendor availability from CNPLX
This plant is available commercially.
Landscaping information from Calscape
Photos on CalPhotos / Google Images

Jepson eFlora

Records from the Consortium of California Herbaria


Search (Flora of North America)

Search the Lady Bird Johnson Wildflower Center

website references from Google

Suggested Citation
Calflora: Information on California plants for education, research and conservation,
with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria.
[web application]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Mar 24, 2018).

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