Regularity: Regularly occurring
Global Range: It occurs in Texas (near Rio Grande in Presidio and Brewster Cos. and along river below Laredo in Webb Co.) and Mexico (from Chihuahua to Nuevo Leon and Zacatecas).
Comments: It occurs on gravelly areas of hills and washes in desert at 750-900 m.
Habitat and Ecology
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 6 - 20
Comments: Ten EO's (Benson 1982).
Life History and Behavior
National NatureServe Conservation Status
Rounded National Status Rank: NNR - Unranked
NatureServe Conservation Status
Rounded Global Status Rank: G4 - Apparently Secure
IUCN Red List Assessment
Red List Category
Red List Criteria
Mammillaria pottsii has a very wide range, is abundant, and there are no major threats. Hence, it is listed as Least Concern.
Comments: Most cacti subject to horticultural collecting.
Mammillaria pottsii, also known as fox-tail cactus or rat-tail nipple cactus, is a species of flowering plant in the Cactaceae family. It was first described by Scheer ex Salm-Dyck, Cact. Hort. 1849: 104 (1850) According to the United Nations Environment Programme, M. leona is a synonym for M. pottsii.
- "Mammillaria pottsii". Flora of North America. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242415363. Retrieved 28 January 2011.
- "Mammillaria pottsii". http://www.mammillarias.net/gallery/mammillaria_species.php?searchstring=pottsii&lg=uk. Retrieved 28 January 2011.
- "Mammilaria pottsii". United Nations Environment Programme, World Conservation Monitoring Centre. http://sea.unep-wcmc.org/isdb/CITES/Taxonomy/tax-species-result.cfm?displaylanguage=eng&source=plants&Genus=Mammillaria&Species=pottsii&Country=&tabname=names. Retrieved 29 January 2011.
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