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Artemisia borealis subsp. borealis, Artemisia borealis subsp. richardsoniana, Artemisia campestris, Artemisia campestris subsp. canadensis, Artemisia frigida, Artemisia furcata, Artemisia tilesii, Atriplex dioica, Aulacomnium acuminatum, Aulacomnium palustre, Aulacomnium turgidum, Bartramia ithyphylla, Bartramia pomiformis, Bartsia alpina, Beckmannia, Beckmannia syzigachne, Betula glandulosa, Betula nana, Betula nana subsp. exilis, Betula nana subsp. nana, Betula neoalaskana, Betula occidentalis, Betula papyrifera, Bidens hyperborea, Bistorta vivipara, Blindia acuta, Blysmopsis rufa, Botrychium lunaria, Brachythecium acutum, Brachythecium cirrosum, Brachythecium turgidum, Braya glabella, Braya glabella subsp. glabella, Braya glabella subsp. purpurascens, Braya humilis, Braya humilis subsp. humilis, Braya thorild-wulffii, Bromus, Bromus caroli-henrici, Bromus commutatus, Bromus hallii, Bromus inermis, Bromus japonicus, Bromus pumpellianus, Bromus pumpellianus subsp. dicksonii, Bromus pumpellianus subsp. pumpellianus, Bromus richardsonii, Bromus riparius, Bromus sect. Bromopsis, Bromus sect. Bromus