Dataset: All Collections
Taxa: Mammillaria macdougalii (Mammillaria gummifera var. macdougalii, Mammillaria heyderi var. macdougalii, Mammillaria gummifera, Mammillaria heyderi ssp. macdougalii, Mammillaria gummifera var. hemisphaerica)
Search Criteria: excluding cultivated/captive occurrences