Field number : SH 1578
Collector : Dennis Sargant (plants collected by Alfred Bernhard Lau)
Species : Echinomastus unguispinus f. 
Locality : Mexicó : Durango (5-8km South of the Presa del Rio Nazas , by Palmito 1000m) * Geocode
Date : 18/05/1988
Notes :
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Taxonomy of the Cactaceae - Joël Lodé = Echinomastus unguispinus
New Cactus Lexicon - David Hunt = Sclerocactus unguispinus
The International Plant Names Index : https://www.ipni.org
Echinomastus (Britton & Rose 1922)
Echinomastus unguispinus ((Engelm.) Britton & Rose 1922)
http://echinomastus.succulentstreasures.com
Semeurs de cactus