Field number : LAU 52
Collector : Alfred Bernhard Lau
Species : Mammillaria petrophila
Locality : Mexicó : Baja California (Sierra de la Laguna 1800m) Google Maps * Geocode
Date : 13/11/1972
Notes :
together with Echinocereus pensilis
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http://www.mammillarias.net
Field number : L 52
Collector : Alfred Bernhard Lau
Species : Mammillaria petrophila
Locality : Mexicó : Baja California (Sierra de la Laguna 1800m) Google Maps * Geocode
Date : 13/11/1972
Notes :
together with Echinocereus pensilis
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http://www.mammillarias.net
Field number : SH 52
Collector : Dennis Sargant (plants collected by Alfred Bernhard Lau)
Species : Mammillaria petrophila
Locality : Mexicó : Baja California (Sierra de la Laguna 1800m) Google Maps * Geocode
Date : 13/11/1972
Notes :
together with Echinocereus pensilis
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http://www.mammillarias.net
Field number : PH 308.01
Collector : Paul Hoxey
Species : Mammillaria petrophila
Locality : East of Todos Santos, Sierra la Laguna, Baja California Sur, Mexicó 1820m Google Maps
Date : 14/05/01
Notes :
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http://www.mammillarias.net
Field number : RH 1926a
Collector : Ralf Hillmann
Species : Mammillaria petrophila
Locality : Mexicó : (B.C. Sur San Antonio de la Sierra 800 m) Google Maps
Date :
Notes :
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http://www.mammillarias.net
Field number : WCO 11
Collector : Wolfgang Colotti
Species : Mammillaria petrophila
Locality : Sierra de la Laguna, Baja California, Mexicó Google Maps
Date : 27/05/09
Notes :
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http://www.mammillarias.net