Wolf Creek Field Guide

A collection of species and observations found in the Wolf Creek Watershed, a tributary of the Bear River, Sierra Nevada Range, California.

milk thistle ¹
Silybum marianum

Cobwebby Thistle ²
Cirsium occidentale

Bull Thistle ³
Cirsium vulgare

Italian thistle ⁴
Carduus pycnocephalus

Edited by Gary Griffith, some rights reserved (CC BY-SA)

Photo Credits

1. no rights reserved, uploaded by Peter de Lange
2. (c) Eric in SF, some rights reserved (CC BY-NC-ND)
3. (c) beautifulcataya, some rights reserved (CC BY-NC-ND)
4. (c) Dawn Endico, some rights reserved (CC BY-SA)

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