Felix & Blum
'Echinocereus - die parkeri-Gruppe'
Looks at the 5 subspecies the authors recognise of the parkeri section, and also nivosus, with descriptions, distribution map, SEMs of seeds and herbarium specimens, well illustrated with many colour photos of varying size from full page to 7 per page. German text with a very brief abstract in English. 2011 9 ¼ x 6 ¾ 144 pages
Comments: , New
ISBN 3000357629 9783000357626
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