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31b. Boechera fernaldiana (Rollins) W. A. Weber subsp. vivariensis (S. L. Welsh) Windham & Al-Shehbaz, Harvard Pap. Bot. 11: 67. 2006.
Arabis vivariensis S. L. Welsh, Great Basin Naturalist 46: 263. 1986; Boechera vivariensis (S. L. Welsh) W. A. Weber
Petals white; sepals greenish, usually glabrous, rarely sparsely pubescent.
Flowering Apr-Jun. Sand-stone rock outcrops, rocky slopes, sandy soil, mostly pinyon-juniper woodlands; 1500-2400 m; Colo., Utah.
Subspecies vivariensis is known only from Moffat County, Colorado, and Uintah County, Utah.
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