english deutsch
Echinocereus blankii
http://www.dipbot.unict.it/orto/0959-1.html
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Echinocereus Online
http://www.echinocereus.de/
An electronic magazine about the genus, in German and English. Includes many images.
Echinocereus pentalophus
http://www.dipbot.unict.it/orto/0960-1.html
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Echinocereus pentalophus
http://florawww.eeb.uconn.edu/acc_num/198502000.html