Division of Genera
Acharagma Escobaria Ortegocactus
During the history of the genera several descriptions of the genera were published including its divisions. The below mentioned links to the particular divisions are thus listed according to the names of authors. You can find there also the refences to publications, where the particular division appeared for the first time.
Joël Lodé
Taxonomy of the Cactaceae. Volumes 1-2. 2015
Eberhard Lutz
Gedanke zu einer Neuordnong der nordamerikanischen Escobarien in den USA und Kanada - das Ergebnis
aus 20 Jahren Feldarbeit, Mitteilungsblatt des AfM, 34(1, 2): 18-41, 80-84, 2010
David R. Hunt, Nigel P. Taylor and Graham Charles
The New Cactus Lexicon, p.26, 112-115, 215, DH Books, 2006
Allan Dale Zimmerman et Bruce D. Parfitt
Flora of North America: North of Mexico, Volume 4 - Magnolophyta: Caryophyllidae - Part 1,
28. Coryphantha (Escobaria), New York and Oxford (2004, online date)
Edward F. Anderson
The Cactus Family, p.108-109, 307-314, 530, Timber Press Portland, Oregon, 2001
Vladislav Šedivý
 
(division compilation according to N.P.Taylor and later combinations)
Rod Escobaria Britton et Rose. Rod Ortegocactus Alexander. Atlas kaktusů 1990 - příloha,
SPKL při ZO ČZS Klubu kaktusářů Chrudim, 1990
Nigel P. Taylor
The Identification of Escobarias (Cactaceae), British Cactus & Succulent Journal, Volume 4 (2) : 36-44 1986
Allan Dale Zimmerman
Systematics of the genus Coryphantha (Cactaceae), The University of Texas at Austin, (UMI Dissertation Information Service) 1985
Nigel P. Taylor
Die Arten der Gattung Escobaria Br. et R., Kakt. und and. Sukk. 34, 76-79, 120-123,
136-140, 154-158, 184-188, 1983
Václav John und Jan Říha
Rozčlení rodu Escobaria Britt. et Rose, Kaktusy 17, 40-44, 63-66, 1981
Curt Backeberg
Das Kakteenlexikon, p.102-109, 149-151, 284-285, 296-297, 337, 548, 624,
VEB Gustav Fischer Verlag Jena, 1966
Franz Buxbaum
Die Phylogenie der nordamerikanischen Echinocacteen, Österreichische botanische
Zeitschrift 88, 75-81, 1951
Nathaniel Lord Britton et Joseph N. Rose
The Cactaceae 4, p.53, 1923