Dataset: All Collections
Taxa: Echinocactus horizonthalonius, Echinocactus horizonthalonius var. horizonthalonius (Echinocactus horizonthalonius var. moelleri), Echinocactus horizonthalonius var. nicholii (Echinocactus horizonthalonius ssp. nicholii)
Search Criteria: mexico; excluding cultivated/captive occurrences