Anonymous - s.n. - United States
Bigelow - s.n. - United States
Boufford - 11615 - United States
Cowles - 481 - United States
Engelmann - s.n. - United States
Fassett - 13679 - United States
Fendler - s.n. - United States
Greene - s.n. - United States
Hale - s.n. - United States
Hall - s.n. - United States
Hayden - s.n. - United States
King - 13844 - United States
King - 14002 - United States
King - 14273 - United States
Macoun - 79506 - Canada
Nilson - s.n. - United States
Opuntia fragilis
Parry - s.n. - United States
Shimek - s.n. - United States
Thompson - s.n. - Canada
Toumey - s.n. - United States
Williams - 1058 - United States
Zeller - s.n. - United States