502 Fields number on the database for David J. Ferguson

All Acanthocalycium Ariocarpus Austrocactus Austrocylindropuntia Cereus Cleistocactus Denmoza Echinocactus Echinocereus Echinopsis Eriocactus Eriocereus Escobaria Ferocactus Gymnocalycium Lobivia Maihuenia Notocactus Opuntia Oreocereus Parodia Portulaca Pterocactus Pyrrhocactus Rebutia Soehrensia Stetsonia Talinum Tephrocactus Trichocereus      

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20 - 40 - 80

Species	Field number	Locality	Picture
Echinocereus reichenbachii v. perbellus	DJF 1637	Logan, Quay County, New Mexicó, USA
Echinocereus viridiflorus	DJF 1673	Black Mesa, Oklahoma, USA

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