Literatur

Cactus and Succulent Journal

Artikel in Cactus and Succulent Journal, The Journal of the Cactus and Succulent Society of America, 2015, Volume 87, No. 1, Seite 15-20

Echinocereus russanthus ssp. weedinii from the Davis Mountains, Texas
Autor: Gerhard & Gisela Böhm