| Mexico | Chihuahua | |
1450 - 2150 m
|
28°39'41"N
|
105°18'00"W
| 24 Aug 1973 | | Marshall C. Johnston, Thomas L. Wendt & Fernando Chiang C. | 12300 | MO |
| Mexico | Chihuahua | |
|
|
| 24 July 1936 | | Harde LeSueur | 717 | MO |
| Mexico | Chihuahua | |
1900 m
|
28°35'30"N
|
105°54'00"W
| 8 July 1972 | | Fernando Chiang C., Thomas L. Wendt & Marshall C. Johnston | 8348 | MO |
| Mexico | Chihuahua | |
5100 ft
|
|
| 20 July 1975 | | Julia Watkins, Jonathan A. Ellis & Kenneth J. Torke | 552 | MO |
| Mexico | Coahuila | |
2800 m
|
25°06'00"N
|
103°13'00"W
| 27 Sep 1972 | | Fernando Chiang C., Thomas L. Wendt & Marshall C. Johnston | 9558 | MO |
| Mexico | Coahuila | |
1967 m
|
25°00'00"N
|
101°15'00"W
| 10 Jul 1941 | | L.R. Stanford, K.L. Retherford & R.D. Northcraft | 262 | MO |
| Mexico | Coahuila | |
1200 - 1300 m
|
26°49'23"N
|
101°16'55"W
| 6 Sep 1976 | | David H. Riskind | 1614 | MO |
| Mexico | Coahuila | |
|
24°24'00"N
|
102°11'00"W
| October 1910 | | C. A. Purpus | 4997 | MO |
| Mexico | Coahuila | |
1200 - 1300 m
|
26°49'23"N
|
101°16'55"W
| 6 Sep 1976 | | David H. Riskind | 1614 | MEXU |
| Mexico | Coahuila | |
2100 m
|
|
| June 28, 1941 | | L.R. Stanford, K.L. Retherford & R.D. Northcraft | 37 | MO |
| Mexico | Coahuila | |
2400 m
|
25°27'00"N
|
103°09'00"W
| 03 Jul 1941 | | L.R. Stanford, K.L. Retherford & R.D. Northcraft | 136 | MO |
| Mexico | Coahuila | Castaños |
|
26°23'24"N
|
101°21'00"W
| June 18, 1936 | | F. Lyle Wynd & Cornelius H. Muller | 182 | MO |
| Mexico | Coahuila | Saltillo |
|
|
| 1898 | | Edward Palmer | 165 | MO |
| Mexico | Nuevo León | |
1850 m
|
|
| 28 Jun 1948 | | Fred G. Meyer & David J. Rogers | 2695 | MO |
| Mexico | Nuevo León | |
|
|
| 02 Sep 1961 | | Walter H. Lewis | 5757 | MO |
| Mexico | San Luis Potosí | |
2100 m
|
22°03'00"N
|
100°39'00"W
| 1 July 1972 | | Fernando Chiang C., Thomas L. Wendt & Marshall C. Johnston | 8201 | MO |
| Mexico | San Luis Potosí | |
|
22°09'00"N
|
100°58'48"W
| 1878 | | Charles C. Parry & Edward Palmer | 42 | MO |
| Mexico | San Luis Potosí | |
|
|
| 1878 | | Charles C. Parry & Edward Palmer | 44 | MO |
| Mexico | San Luis Potosí | |
1700 m
|
22°46'00"N
|
101°05'00"W
| 02 Jul 1972 | | Fernando Chiang C., Thomas L. Wendt & Marshall C. Johnston | 8215 | MO |
| Mexico | San Luis Potosí | |
2200 m
|
23°35'00"N
|
100°56'00"W
| 3 July 1972 | | Fernando Chiang C., Thomas L. Wendt & Marshall C. Johnston | 8246 | MO |
| Mexico | San Luis Potosí | |
6000 - 8000 ft
|
|
| 1878 | | Charles C. Parry & Edward Palmer | 42 | MO |
| Mexico | San Luis Potosí | |
6000 - 8000 ft
|
|
| 1878 | | Charles C. Parry & Edward Palmer | 41 | K |
| Mexico | San Luis Potosí | |
6000 - 8000 ft
|
|
| 1878 | | Charles C. Parry & Edward Palmer | 41 | GH |
| Mexico | San Luis Potosí | |
6000 - 8000 ft
|
|
| 1878 | | Charles C. Parry & Edward Palmer | 41 | MO |
| Mexico | Tamaulipas | |
2460 m
|
23°42'00"N
|
099°45'00"W
| 08 Aug 1941 | | L.R. Stanford, K.L. Retherford & R.D. Northcraft | 787 | MO |
| Mexico | Zacatecas | |
|
|
| 11 Aug 1904 - 14 Aug 1904 | | Edward Palmer | 255 | MO |
| Mexico | Zacatecas | |
1400 - 1500 m
|
25°04'00"N
|
102°07'00"W
| 30 Jun 1973 | | Marshall C. Johnston, Thomas L. Wendt & Fernando Chiang C. | 11525 | MO |
| Mexico | Zacatecas | |
2250 m
|
24°38'00"N
|
101°59'00"W
| 17 Jun 1972 | | Fernando Chiang C., Thomas L. Wendt & Marshall C. Johnston | 7918 | MO |
| Mexico | Zacatecas | |
1775 m
|
24°32'00"N
|
101°10'00"W
| 01 Jul 1973 | | Marshall C. Johnston, Thomas L. Wendt & Fernando Chiang C. | 11550 | MO |
| Mexico | Zacatecas | |
|
|
| 9 Apr 1908 | | Francis E. Lloyd | 49 | MO |
| United States | Texas | Brewster |
|
[29°50'00"N]
|
[103°15'20"W]
| 24 June 1964 | | Donovan S. Correll & Craig A. Hanson | 29879 | MO |
| United States | Texas | Brewster |
|
[29°50'00"N]
|
[103°15'20"W]
| 17 June 1940 | | Barton H. Warnock | W122 | MO |
| United States | Texas | Culberson |
|
[31°27'00"N]
|
[104°35'00"W]
| 06 September 1960 | | Walter H. Lewis | 5540 | MO |
| United States | Texas | Culberson |
|
[31°27'00"N]
|
[104°35'00"W]
| July 2, 1958 | | Donovan S. Correll & Ivan Murray Johnston | 19132 | MO |
| United States | Texas | Jeff Davis |
6080 ft
|
30°36'17"N
|
104°12'50"W
| 28 July 2016 | | George Yatskievych, A. Brenek & D. Warren-Hammack | 16-326 | MO |
| United States | Texas | Jeff Davis |
6080 ft
|
30°36'17"N
|
104°12'50"W
| 28 July 2016 | | George Yatskievych, A. Brenek & D. Warren-Hammack | 16-326 | TEX |
| United States | Texas | Pecos |
|
[30°45'20"N]
|
[102°45'20"W]
| 30 August 1960 | | Walter H. Lewis | 5515 | MO |
| United States | Texas | Pecos |
|
[30°45'20"N]
|
[102°45'20"W]
| 17 July 1943 | | Benjamin C. Tharp | 43-657 | MO |
| United States | Texas | Presidio |
|
[29°55'00"N]
|
[104°15'20"W]
| 22 August 1919 | | Herbert C. Hanson | s.n. | MO |