(16)__Arabis missouriensis, commonly known as Missouri rockcress;

(17)__Arctostaphylos alpina, commonly known as alpine bearberry;

(18)__Aristida basiramea, commonly known as branching needle-grass;

(19)__Armoracia lacustris, commonly known as lake- cress;

(20)__Arnica lanceolata, commonly known as hairy arnica;

(21)__Artemisia campestris ssp. borealis, commonly known as Canadian wormwood;

(22)__Asarum canadense, commonly known as wild ginger;

(23)__Asclepias tuberosa, commonly known as butterfly weed;

(24)__Asplenium platyneuron, commonly known as ebony spleenwort;

(25)__Asplenium rhizophyllum, commonly known as walking fern;

(26)__Asplenium trichomanes-ramosum, commonly known as green spleenwort;

(27)__Aster divaricatus, commonly known as white wood aster;

(28)__Aster patens, commonly known as late purple aster;

(29)__Aster schreberi, commonly known as Schreber's aster;

(30)__Astragalus alpinus, commonly known as alpine milk-vetch;

(31)__Astragalus eucosmus, commonly known as elegant milk-vetch;

(32)__Astragalus robbinsii, commonly known as Robbin's milk-vetch;