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• E. nuttallianus:

  E. nuttallianus Utah	E. nuttallianus Missouri	E. nuttallianus Culberson Co.

  E. nuttallianus Presidio Co.	E. nuttallianus Terrell Co.	E. nuttallianus Bell Co.

  E. nuttallianus (glabrous form) Hays Co.	E. nuttallianus Dallas Co.	E. nuttallianus Winkler Co.

  
  E. nuttallianus
  Gaines Co.
• E. sericeus:

  E. sericeus Kleberg Co.	E. sericeus Brazos Co.	E. sericeus Hays Co.

• E. discolor:

  E. discolor Jeff Davis Co.	E. discolor Jeff Davis Co.	E. discolor (previously as E. nuttallianus) Jeff Davis Co.

  E. discolor (previously as E. nuttallianus) Brewster Co.	E. discolor (previously as E. nuttallianus) Pecos Co.	E. discolor (previously as E. nuttallianus) Chihuahua

  E. discolor (previously as E. nuttallianus) Coahuila

• E. alsinoides:

  E. alsinoides Val Verde Co.	E. alsinoides Presidio Co.	E. alsinoides Cameron Co.