Field number : LAU 98
Collector : Alfred Bernhard Lau
Species : Echinocereus websterianus   
Locality : Mexicó : Sonora (Isla San Pedro Nolasco 0-200m)     Google Maps  * Geocode
Date : 19/05/1973
Notes :
together with L99, Mammillaria tayloriorum, Pachycereus pringlei

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Field number : L 98
Collector : Alfred Bernhard Lau
Species : Echinocereus websterianus   
Locality : Mexicó : Sonora (Isla San Pedro Nolasco 0-200m)     Google Maps  * Geocode
Date : 19/05/1973
Notes :
together with L99, Mammillaria tayloriorum, Pachycereus pringlei

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Field number : SH 98
Collector : Dennis Sargant (plants collected by Alfred Bernhard Lau)
Species : Echinocereus websterianus   
Locality : Mexicó : Sonora (Isla San Pedro Nolasco 0-200m)     Google Maps  * Geocode
Date : 19/05/1973
Notes :
together with L99, Mammillaria tayloriorum, Pachycereus pringlei

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Field number : ISI 882
Collector : International Succulent Introductions (previously International Succulent Institute)
Species : Echinocereus websterianus   
Locality :     Google Maps
Date : 01/03/75
Notes :
Seedlings from seed of horticultural origin

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Field number : MZ 1399
Collector : Milan Zachar
Species : Echinocereus websterianus ???  
Locality : Mexicó : Baja California Norte (Isla Esteban)     Google Maps  * Geocode
Date :
Notes :

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Field number : KMR 377
Collector : Miroslav Kupčák
Species : Echinocereus tayopensis-websterianus   
Locality : Mexicó : Sonora (Yecora/behind/km 28-Ej.El Castillo-rd.maycoba)     Google Maps  * Geocode
Date :
Notes :

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Field number : NM 2752
Collector : New Mexico Cactus Research (Horst Kuenzler)
Species : Echinocereus websterianus   
Locality : Isla San Pedro Nolasco, Sonora, Mexicó     Google Maps
Date :
Notes :

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Field number : NM 2753
Collector : New Mexico Cactus Research (Horst Kuenzler)
Species : Echinocereus websterianus   
Locality : San Pedro Nolasco, Sonora, Mexicó     Google Maps
Date :
Notes :

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