Y. potosina Rzed. Y. queretaroensis I.L Pina Y. whíppleí Torr. var. eremica Epling & Haines
1 Taxa considered to be micro-aerial (narrow) endemics inhabiting zones of less than 100km in length and width.
Appendix 1 No international trade allowed Appendix II International trade only by permit IUCN Categories at the global level (old categories of threat are used here): see Annex 16
4 US Fish and Wildlife Service (USFWS) listing:
E = Endangered: any species in danger of extinction throughout all or a significant portion of its range.
T = Threatened: any species likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range. CI = Category 1 status: taxa for which the FWS has sufficient (but not necessarily complete) information on vulnerability and threats to support a proposal to list them as threatened or endangered.
C2= Category 2 status: taxa for which the FWS has insufficient information to support a proposed rule to add the species to the threatened or endangered species list; further biological research and field study will usually be needed to change the status of taxa in category 2. C3= Category 3 status: taxa that are no longer being considered for listing as endangered or threatened (and included in one of the three subcategories).
5 SEMARNAP Categories for Mexico
P = in danger of extinction (en peligro de extinción)
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