Regularity: Regularly occurring
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: Unknown
National NatureServe Conservation Status
Rounded National Status Rank: NU - Unrankable
NatureServe Conservation Status
Rounded Global Status Rank: TU - Unrankable
Reasons: Difficulty identifying these plants and therefore the lack of data necessary to rank (# of EOs, range extent, area of occupancy, threats, and # of individuals) makes it difficult to determine the conservation status of this taxon. Thought to be endemic to Arizona.
Degree of Threat: Unknown
Comments: Most cacti subject to horticultural collecting. Otherwise, threats are unknown.
Biological Research Needs: Determine the reason that this taxon is difficult to ID and if it is related to taxonomic uncertainty.
Names and Taxonomy
Comments: Recognized by Kartesz (1994 and 1999), considered endemic to Arizona. However, so difficult to distinguish that Arizona Natural Heritage Program does not track. See Ferocactus cylindraceus.
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