Eastern Mojave Vegetation Coll. No. 3430, Heracleum maximum.  
 

 

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If you have a question or a comment about this photograph you may write to me at: tomas@schweich.com I sometimes post interesting questions in my FAQ, but I never disclose your full name or address. 		  Apiaceae, Heracleum maximum
Photographed 26 December 2025.

Plants of Colorado
East Slope of Tarryall Mountains, Jefferson County
Apiaceae

Heracleum maximum Bartr.  Common Cow Parsnip.

North Twin Creek, Jefferson County, Colorado. Left bank of North Twin Creek, 185 m. northwest of the F. R. 211 crossing of North Twin Creek. 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. 39.20888°N, 105.34703°W. WGS 1984 Elev. 2407 m. Leaves ternate, large lobes, flowers white. Streamside mature ponderosa pine and Douglas fir forest, also collected here: Monarda fistulosa, Rubis idaeus, and Verbascum thapsus. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity.

Collected by permit: Pike San Isabel National Forest, 2025, issued: Mar 26, 2025, to: Tom Schweich.

Tom Schweich 3430. 2-Jul-2025

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Date and time this page was prepared: 4/4/2026 8:04:21 PM