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Plants of the Lower Arroyo Seco

spear thistle 1
Cirsium vulgare
milk thistle
Silybum marianum
Italian thistle 2
Carduus pycnocephalus

Edited by Jessica Blickley, some rights reserved (CC BY-SA)

Photo Credits

  • 1. (c) Sciadopitys, some rights reserved (CC BY-SA)
  • 2. (c) Dawn Endico, some rights reserved (CC BY-SA)

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