Alnus, 22

Alopecurus, 4

Alsike Clover, 61

Althaea, 72

Alum Root, 50, 51

Alyssum, 42, 46

Alyssum, Yellow, 42, 46

Amaranth Family, 30

Amaranthaceae, 30

Amaranthus, 30

Amaryllidaceae, 14

Amaryllis Family, 14

Ambrosia, 114

Amelanchier, 55

American Columbo, 88

American Ipecac, 57

Ammophila, 4

Amorpha, 58

Amphicarpa, 59

Anacardiaceae, 68

Anagallis, 87

Anaphalis, 120

Andromeda, 86

Andropogon, 5

Androsace, 87

Anemone, 38, 39

Anemone, Rue, 39

Anemone, Wood, 38

Anemonella, 39

Angelica, 82

Anonaceae, 40

Antennaria, 120

Anthemis, 130

Antirrhinum, 103

Anychia, 31

Apios, 58

Aplectrum, 16

Apocynaceae, 90

Apocynum, 90

Appalachian Cherry, 54

Apple, 54

Apple of Peru, 101

Aquifoliaceae, 69

Aquilegia, 36

Arabis, 46, 47

Araceae, 8

Aralia, 80

Araliaceae, 80

Arbutus, Trailing, 85

Arceuthobium, 25

Arctium, 117

Arctostaphylos, 85

Arenaria, 32

Arethusa, 16

Arisaema, 8

Aristolochia, 25

Aristolochiaceae, 25

Arnica, 123

Arrow Arum, 9

Arrow Grass, 3

Arrow Grass Family, 3

Arrow-head, 3

Arrow Wood, 111

Artemisia, 119

Artichoke, Jerusalem, 129

Arum Family, 8

Asarum, 25

Asclepias, 90, 91

Asclepiadaceae, 90

Ash, 88

Ash, Mountain, 52

Ash, Prickly, 65

Asimina, 40

Asparagus, 10

Aspen, 19

Aster, 132-134

Atriplex, 29

Avena, 6

Avens, 56, 57

Baby's Breath, 34

Balm of Gilead, 19

Balsam, 1

Balsam Poplar, 19

Balsaminaceae, 71

Baneberry, 39

Baptisia, 61

Barbarea, 44

Barberry, 40

Barberry Family, 40

Barnyard Grass, 5

Barren Strawberry, 55

Bartonia, 88

Basil, 97

Basil-thyme, 97

Basswood, 72

Bayberry, 21

Beach Grass, 4

Beach Pea, 59

Beaked Hazel, 22

Bearberry, 85

Beard Grass, 5

Beard-tongue, 104

Bedstraw, 108, 109

Beech, 22

Beech Drops, 84, 106

Beech Family, 22

Beggar Lice, 94

Beggar Ticks, 124

Bellflower, 112

Bellflower Family, 112

Bellwort, 12

Benzoin, 41

Berberidaceae, 40

Berberis, 40

Bergamot Mint, 98

Berula, 81

Betula, 21, 22

Betulaceae, 21

Bidens, 123, 124

Bilberry, 86, 87

Bindweed, 91, 92

Bindweed, Black, 28

Birch, 21, 22

Birch Family, 21

Bird-foot Violet, 75

Birthwort Family, 25

Bishop's Cap, 51

Bistort, 28

Bitter Cress, 45, 47

Bitter Dock, 26

Bitter Nut, 21

Bittersweet, 100

Bitter-sweet, 69

Black Alder