Field number : LAU 220
Collector : Alfred Bernhard Lau
Species : Espostoa ritteri 
Locality : Perú : Amazonas (Balsas 1000-1200m) Google Maps * Geocode
Date : 11/09/1969
Notes :
together with Matucana formosa, Matucana krahnii, Matucana weberbaueri v. flammea
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Field number : L 220
Collector : Alfred Bernhard Lau
Species : Espostoa ritteri
Locality : Perú : Amazonas (Balsas 1000-1200m) Google Maps * Geocode
Date : 11/09/1969
Notes :
together with Matucana formosa, Matucana krahnii, Matucana weberbaueri v. flammea
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Field number : BB 746.02
Collector : Brian Francis Bates
Species : Espostoa ritteri
Locality : Perú : Amazonas (Chachapoyas, 17 km above Balsas 1710m) Google Maps * Geocode
Date : 2000/06/28
Notes :
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Field number : CS 142.6
Collector : Chris Sherrah
Species : Espostoa ritteri
Locality : Perú : Amazonas (Balsas, 1687 m) Google Maps
Date : 16/06/2010
Notes :
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Field number : SH 220
Collector : Dennis Sargant (plants collected by Alfred Bernhard Lau)
Species : Espostoa ritteri
Locality : Perú : Amazonas (Balsas 1000-1200m) Google Maps * Geocode
Date : 11/09/1969
Notes :
together with Matucana formosa, Matucana krahnii, Matucana weberbaueri v. flammea
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Field number : ISI 231
Collector : International Succulent Introductions (previously International Succulent Institute)
Species : Espostoa ritteri
Locality : Bellavista, along Maranon River, Northern Perú Google Maps
Date : 01/03/62
Notes :
Seed collected as FR274 near the type locality
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Field number : KK 547
Collector : Karel Kníže
Species : Espostoa ritteri
Locality : Perú : (Bagua,1000m) Google Maps
Date :
Notes :
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Field number : KK 1532
Collector : Karel Kníže
Species : Espostoa ritteri
Locality : Perú : (Bagua,1000m) Google Maps
Date :
Notes :
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