Eastern Mojave Vegetation Coll. No. 3478, Lactuca serriola.  
 

 

Home Page
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. 		  Asteraceae, Lactuca serriola
Photographed 20 November 2025.

Plants of the Coal Creek Canyon Study Area
Jefferson County Open Space, Colorado, USA
Asteraceae

Lactuca serriola L.  Prickly Lettuce.

Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. North side of Coal Creek, south-facing bank between Colorado State Highway 72 “Coal Creek Canyon Road” and the creek, 1.47 km. northwest of Coal Creek Fire Station #3, 1.51 km. north northwest of Golden. 39.87947°N, 105.29293°W. WGS 1984 Elev. 2060 m. Leaf margin and abaxial midrib prickly; flowers yellow, cypselae 4-6 nerves per face. Openings in Pinus ponderosa woodland, with Artemisia ludoviciana, Penstemon virens, Eriogonum arcuatum, Cercocarpus montanus, Acer glabrum, Bouteloua gracilis, and Koeleria macrantha,

Collected by permit: Jefferson County Open Space, 2025, issued: May 1, 2025, to: Tom Schweich.

Tom Schweich 3478. 28-Jul-2025

Article records that use this photograph:

Other photos about Species - Asteraceae or Lactuca serriola.

 

[Home Page]

Date and time this page was prepared: 4/4/2026 8:05:02 PM