Cactus and Succulent Field Number

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Field number : L 636
Collector : Alfred Bernhard Lau
Species : Thelocactus heterochromus   cactuspro.com
Locality : Mexicó : Durango (Santiago Papasquiaro 2200m)      * Geocode
Date : 08/11/1973
Notes :
together with Mammillaria gummifera, Echinocereus polyacanthus

Taxonomy of the Cactaceae - Joël Lodé = Thelocactus bicolor subsp. heterochromus
New Cactus Lexicon - David Hunt = Thelocactus bicolor subsp. heterochromus

The International Plant Names Index : http://www.ipni.org
Thelocactus ((K. Schumann) Britton & Rose 1922)
Thelocactus heterochromus