Porophyllum gracile 1 Saguaro National Park 6, Tucson, Arizona 130425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).
Porophyllum gracile 2 Saguaro National Park 6, Tucson, Arizona 130425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).
Porophyllum gracile 3 Saguaro National Park 6, Tucson, Arizona 130425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).
Porophyllum ruderale 1 Lund Bot Garden 130819 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).
Porophyllum ruderale 2 Lund Bot Garden 130819 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).