Region
Country
Specimen coordinates in square brackets [ ] have been approximated based on political units.
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| Mexico | Baja California | |
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| 02 July 1885 | | Charles Russell Orcutt | s.n. | MO |
| Mexico | Baja California Sur | |
420 m
|
27°34'00"N
|
114°33'00"W
| 10 March 1991 | | Dennis E. Breedlove & C. Burns | 71827 | MO |
| Mexico | Sonora | |
81 m
|
31°33'00"N
|
113°21'00"W
| 15 March 1936 | | Ira L. Wiggins | 8367 | MO |
| Mexico | Sonora | |
475 m
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31°08'00"N
|
112°26'00"W
| 11 March 1936 | | Forrest Shreve | 7562 | MO |
| Mexico | Sonora | |
80 m
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31°33'00"N
|
113°23'00"W
| 15 March 1936 | | Forrest Shreve | 7593 | MO |
| Mexico | Sonora | |
182 m
|
31°55'00"N
|
113°18'00"W
| 21 March 1978 | | Grady L. Webster | 22348 | MO |
| United States | Arizona | Coconino |
|
[36°05'00"N]
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[112°08'00"W]
| 10 MAY 1974 | | N. Duane Atwood | 6108 | UMO |
| United States | Arizona | Coconino |
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[36°05'00"N]
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[112°08'00"W]
| 19 MAY 1973 | | Douglas G. LeDoux, David B. Dunn & Katherine L. Morris | 764 | UMO |
| United States | Arizona | Coconino |
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[36°05'00"N]
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[112°08'00"W]
| 19 MAY 1973 | | Douglas G. LeDoux, Katherine L. Morris & David B. Dunn | 746 | UMO |
| United States | Arizona | Maricopa |
|
[33°30'00"N]
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[112°30'00"W]
| 08 MAR 1969 | | David J. Keil | 4063 | UMO |
| United States | Arizona | Pima |
|
32°25'00"N
|
111°05'00"W
| 14 April 1992 | | Mary Merello & David R. Brunner | 208 | MO |
| United States | Arizona | Pima |
450 - 500 m
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32°19'55"N
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112°47'15"W
| 17 April 1998 | | Mary Merello & Heidi H. Schmidt | 1893 | |
| United States | California | |
|
|
| 24 April 1937 | | John T. Middleton | 149b | UMO |
| United States | California | Imperial |
270 m
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32°58'36"N
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114°41'40"W
| 13 April 1994 | | Chris Dietrich, Mary Merello & Heidi H. Schmidt | 41 | |
| United States | California | Imperial |
900 f
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[33°02'00"N]
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[115°25'00"W]
| 29 MAR 1974 | | Noel H. Holmgren & Patricia K. Holmgren | 7541 | UMO |
| United States | California | Inyo |
|
[36°35'00"N]
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[117°25'00"W]
| 23 MAY 1973 | | Douglas G. LeDoux, Patricia L. Kenney & David B. Dunn | 799A | UMO |
| United States | California | Inyo |
4000 f
|
[36°35'00"N]
|
[117°25'00"W]
| 19 APR 1937 | | Percy Train | s.n. | UMO |
| United States | California | Riverside |
70-122 m
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[33°44'00"N]
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[116°03'00"W]
| 23 APR 1975 | | Billy Joe Cox | 4166 | UMO |
| United States | California | San Diego |
|
[33°02'00"N]
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[116°48'00"W]
| 10 APR 1941 | | David B. Dunn | 1066 | UMO |
| United States | California | San Diego |
400 f
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[33°02'00"N]
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[116°48'00"W]
| 24 MAR 1974 | | Noel H. Holmgren & Patricia K. Holmgren | 7482 | UMO |
| United States | California | San Diego |
220 m
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32°51'00"N
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116°12'00"W
| 6 March 2005 | | Greg Gust & Leith Nye | 497 | MO |
| United States | Colorado | Mesa |
5150 f
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[39°02'00"N]
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[108°28'00"W]
| 26 MAY 1973 | | William E. Harmon, J. R. Pease & James W. Golden | 7303 | UMO |
| United States | Colorado | Moffat |
5800 f
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[40°39'00"N]
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[108°05'00"W]
| 25 JUN 1971 | | MACLEOD | 2003 | UMO |
| United States | Nevada | Churchill |
5000 f
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[39°30'10"N]
|
[118°15'10"W]
| 23 MAY 1936 | | Percy Train | s.n. | UMO |
| United States | Nevada | Clark |
914 m
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[36°00'10"N]
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[114°57'10"W]
| 07 MAY 1975 | | Noel H. Holmgren & Patricia K. Holmgren | 7900 | UMO |
| United States | Nevada | Elko |
5300 f
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[41°00'10"N]
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[115°30'10"W]
| 31 MAY 1971 | | David B. Dunn & Jeffrey Huber | 17667 | UMO |
| United States | Nevada | Esmeralda |
5000 f
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37°27'00"N
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117°21'00"W
| 22 MAY 1973 | | Melvin L. Conrad, Douglas G. LeDoux & Patricia L. Kenney | 6768 | UMO |
| United States | Nevada | Lincoln |
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[38°00'10"N]
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[114°57'10"W]
| 22 MAY 1973 | | Patricia L. Kenney, Melvin L. Conrad & David B. Dunn | 221 | UMO |
| United States | Nevada | Lincoln |
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[38°00'10"N]
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[114°57'10"W]
| 22 MAY 1973 | | Patricia L. Kenney, Katherine L. Morris & David B. Dunn | 280 | UMO |
| United States | Nevada | Lincoln |
5425 f
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[38°00'10"N]
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[114°57'10"W]
| 18 JUN 1968 | | Billy Joe Cox, David B. Dunn & William E. Harmon | 309 | UMO |
| United States | Nevada | Lincoln |
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[38°00'10"N]
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[114°57'10"W]
| 22 MAY 1973 | | Patricia L. Kenney, Douglas G. LeDoux & David B. Dunn | 259 | UMO |
| United States | Nevada | Lincoln |
1291 m
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37°45'06"N
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115°07'54"W
| 30 April 2017 | | Greg Gust | 3121 | MO |
| United States | Nevada | Lincoln |
1546 m
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37°22'12"N
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115°16'19"W
| 09 May 2017 | | Greg Gust | 3177 | MO |
| United States | Nevada | Lincoln |
1476 m
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37°36'01"N
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115°19'35"W
| 17 May 2017 | | Greg Gust | 3334 | MO |
| United States | Nevada | Lincoln |
1368 m
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37°39'51"N
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115°14'28"W
| 20 May 2017 | | Greg Gust | 3534 | MO |
| United States | Nevada | Lincoln |
1553 m
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37°51'18"N
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115°12'49"W
| 21 May 2017 | | Greg Gust | 3575 | MO |
| United States | New Mexico | Doña Ana |
4106 f
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31°48'11"N
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107°07'03"W
| 8 Apr 2004 | | Robert M. King & Robert M. Garvey | 12952 | MO |
| United States | Texas | El Paso |
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[31°48'00"N]
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[106°12'00"W]
| April 1851 - 1852 | | Charles (Carlos) Wright | 1411 | MO |
| United States | Utah | San Juan |
4400 f
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37°15'00"N
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109°38'00"W
| 19 MAY 1973 | | Melvin L. Conrad, Douglas G. LeDoux & David B. Dunn | 6689 | UMO |
| United States | Utah | Uintah |
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[40°23'40"N]
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[109°27'20"W]
| 15 JUL 1965 | | Jack D. Brotherson | 823 | UMO |
| United States | Utah | Uintah |
1500 m
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[40°23'40"N]
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[109°27'20"W]
| 29 MAY 1976 | | Arthur J. Cronquist | 11477 | UMO |
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