Echinocactus polycephalus var. polycephalus Cottontop Cactus ID: 8120 3181 4573 0118 [detail] Charles Webber © 1998 California Academy of Sciences
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Echinocactus polycephalus var. polycephalus Cottontop Cactus ID: 5208 1611 2417 0034 [detail] © 1995 Saint Mary's College of California
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Echinocactus polycephalus var. polycephalus Clustered Barrel Cactus ID: 0000 0000 1002 0579 [detail] © 2002 Hartmut Wisch
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Echinocactus polycephalus var. polycephalus Cottontop Cactus ID: 5208 1611 2417 0033 [detail] © 1995 Saint Mary's College of California
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Echinocactus polycephalus var. polycephalus Cottontop Cactus ID: 8120 3181 4573 0120 [detail] Charles Webber © 1998 California Academy of Sciences
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Echinocactus polycephalus var. polycephalus Cottontop Cactus ID: 8253 3202 3490 0010 [detail] Gerald and Buff Corsi © 1999 California Academy of Sciences
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Echinocactus polycephalus var. polycephalus Mojave Mound ID: 1073 3283 3182 0010 [detail] Glenn and Martha Vargas © 2002 California Academy of Sciences
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Echinocactus polycephalus var. polycephalus Cottontop Cactus ID: 1073 3283 3182 0012 [detail] Glenn and Martha Vargas © 2002 California Academy of Sciences
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Echinocactus polycephalus var. polycephalus Clustered Barrel Cactus ID: 0000 0000 1002 0580 [detail] © 2002 Hartmut Wisch
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Echinocactus polycephalus var. polycephalus Cottontop Cactus ID: 8120 3181 4573 0119 [detail] Charles Webber © 1998 California Academy of Sciences
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Echinocactus polycephalus var. polycephalus Cottontop Cactus ID: 8253 3202 4143 0141 [detail] Albert P. Bekker © 1999 California Academy of Sciences
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Echinocactus polycephalus var. polycephalus Cottontop Cactus ID: 0000 0000 0404 0694 [detail] © 2004 Michelle Cloud-Hughes
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Echinocactus polycephalus var. polycephalus (shown with Xylorhiza tortifolia ssp. tortifolia) ID: 0000 0000 0504 0035 [detail] © 2004 Michelle Cloud-Hughes
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Echinocactus polycephalus var. polycephalus Cottontop Cactus ID: 0000 0000 0206 0385 [detail] © 2006 Chris Wagner, SBNF
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Echinocactus polycephalus var. polycephalus ID: 0000 0000 0616 1999 [detail] © 2016 Barry Rice
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Echinocactus polycephalus var. polycephalus ID: 0000 0000 0616 2000 [detail] © 2016 Barry Rice
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Echinocactus polycephalus var. polycephalus ID: 0000 0000 0616 2002 [detail] © 2016 Barry Rice
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Echinocactus polycephalus var. polycephalus ID: 0000 0000 0616 2003 [detail] © 2016 Barry Rice
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Echinocactus polycephalus var. polycephalus ID: 0000 0000 0616 2004 [detail] © 2016 Barry Rice
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Echinocactus polycephalus var. polycephalus ID: 0000 0000 0616 2005 [detail] © 2016 Barry Rice
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Echinocactus polycephalus var. polycephalus ID: 3333 3333 1007 0086 [detail] © University and Jepson Herbaria
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Echinocactus polycephalus var. polycephalus ID: 0000 0000 1207 1593 [detail] © 2007 Jason E. Willand
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Echinocactus polycephalus var. polycephalus ID: 0000 0000 1207 1592 [detail] © 2007 Jason E. Willand
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Echinocactus polycephalus var. polycephalus Cottontop Cactus ID: 0000 0000 0209 0206 [detail] © 2009 Keir Morse
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