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Aquilegia scopulorum, Aquilegia shockleyi, Aquilegia vulgaris, Arabidopsis, Arabidopsis arenicola, Arabidopsis arenosa, Arabidopsis arenosa subsp. arenosa, Arabidopsis lyrata, Arabidopsis lyrata subsp. kamchatica, Arabidopsis lyrata subsp. lyrata, Arabidopsis lyrata subsp. petraea, Arabidopsis thaliana, Arabis, Arabis aculeolata, Arabis alpina, Arabis blepharophylla, Arabis caucasica, Arabis crucisetosa, Arabis eschscholtziana, Arabis furcata, Arabis georgiana, Arabis mcdonaldiana, Arabis modesta, Arabis nuttallii, Arabis olympica, Arabis oregana, Arabis patens, Arabis pycnocarpa, Arabis pycnocarpa var. adpressipilis, Arabis pycnocarpa var. pycnocarpa, Araceae, Arbutus, Arbutus arizonica, Arbutus menziesii, Arbutus xalapensis, Arctanthemum, Arctanthemum arcticum, Arctanthemum arcticum subsp. arcticum, Arctanthemum arcticum subsp. polare, Arctium, Arctium lappa, Arctium minus, Arctium tomentosum, Arctostaphylos, Arctostaphylos andersonii, Arctostaphylos auriculata, Arctostaphylos bakeri, Arctostaphylos bakeri subsp. bakeri, Arctostaphylos bakeri subsp. sublaevis, Arctostaphylos canescens