Chapter 19

=Linear-lanceolate.= Intermediate in shape between linear and lanceolate; narrowly lanceolate.

=Lip.= The largest and most conspicuous petal in an irregular corolla, usually applied to the lower petal of an orchid.

=Lobe.= A segment or division of any organ.

=Leaflet.= One portion of the blade of a compound leaf.

=Lemma.= One of the bracts in the spikelet of a grass, and described in the treatment of that family.

=Membranous.= Thin or membrane-like in texture.

=Monoecious.= Bearing stamens and pistils in separate flowers, but on the same plant.

=Mucronate.= Tipped with a short small abrupt tip.

=Node.= A joint of a stem, at which leaves are borne and branches appear.

=Oblanceolate.= Reversed lanceolate in shape.

=Oblique.= With unequal sides.

=Oblong.= Somewhat rectangular in shape, with parallel sides.

=Oblong-lanceolate.= Intermediate in shape between oblong and lanceolate.

=Oblong-spatulate.= Intermediate in shape between oblong and spatulate.

=Obovate.= Reversed ovate in shape.

=Obtuse.= Blunt-tipped; terminating in an obtuse angle.

=Odd-pinnate.= A compound leaf terminating in a single leaflet.

=Once-compound.= A compound leaf bearing leaflets at the end or along the sides of the main axis.

=Once-pinnate.= A compound leaf bearing leaflets along the sides of the axis.

=Open sheath.= A leaf-sheath with separate margins.

=Opposite.= Situated in pairs on opposite sides of the stem or axis.

=Ovary.= The basal, usually swollen portion of the pistil, within which the seeds are produced.

=Ovate.= Egg-shape in outline.

=Ovate-lanceolate.= Intermediate in shape between ovate and lanceolate; broadly lanceolate or narrowly ovate.

=Ovate-oblong.= Intermediate in shape between ovate and oblong.

=Ovoid.= Egg-shape.

=Palmate.= With several organs or structures attached at or proceeding from the same point; applied chiefly to the arrangement of principal veins in a leaf and of leaflets in a compound leaf.

=Panicle.= A loose, more or less irregular, branching cluster of pedicelled flowers, usually much longer than thick.

=Parallel-veined.= With the principal veins of the leaf paralleling each other from the base to the apex, or (rarely) from the mid-rib to the margin.

=Pedicel.= The stalk of a single flower.

=Parasite.= A plant which grows attached to another and derives its nourishment from it.

=Peduncle.= The stalk of a flower-cluster, or of a solitary flower.

=Peltate.= Attached to the stalk by the lower surface, instead of the margin.

=Perennial.= Living through several seasons.

=Perfect.= Bearing stamens and pistils in the same flower.

=Perfoliate.= Clasping the stem so completely that the stem seems to pass through it.

=Perianth.= The calyx and corolla of a flower.

=Perigynium.= A sac-like structure surrounding the achene of a sedge.

=Persistent.= Remaining attached for a considerable time.

=Petal.= One member or segment of the corolla.

=Petiole.= The stalk of a leaf.

=Pinnate.= With several organs or structures attached at the sides of an axis or stalk; applied chiefly to the arrangement of the principal veins in a leaf and of leaflets in a compound leaf.

=Pinnatifid.= Deeply pinnately cut or divided.

=Pistil.= The central portion of a flower, consisting of ovary, style, and stigma; the seed-bearing part of the flower.

=Pistillate.= Bearing pistils.

=Polygamous.= Applied to plants in which some flowers are perfect and others either staminate or pistillate.

=Pubescent.= Hairy.

=Raceme.= A more or less elongated flower-cluster, bearing pedicelled flowers along a single axis.

=Racemose.= Arranged in racemes.

=Receptacle.= The end of a peduncle or pedicel upon which the organs of a flower, or the flowers of a head, are attached.

=Recurved.= Curved back.

=Reflexed.= Abruptly bent back or down.

=Regular.= Uniform in shape or structure. Flowers are generally considered regular when all the petals are of the same size and shape.

=Retrorse.= Directed backward or downward.

=Revolute.= Rolled backward or under.

=Rootstock.= A horizontal subterranean stem, sending up leaves or stems.

=Rotate.= Wheel-shape; essentially flat and circular.

=Sac-like.= Inflated; sack-like.

=Sagittate.= Shaped like an arrow-head.

=Salver-form.= A corolla having a slender tube abruptly expanded at the summit into a flat or spreading portion.

=Scape.= A peduncle arising directly from the base of the plant, leafless or bearing bracts only.

=Segment.= One member or portion of an organ.

=Sepal.= One member or portion of the calyx.

=Serrate.= With sharp teeth at the margin.

=Serrulate.= Finely or minutely serrate.

=Sessile.= Without a stalk, petiole, or pedicel.

=Sheathing.= Inclosing.

=Simple.= In one piece; not compound; usually applied to leaves with a single blade.

=Sinuate.= Wavy-margined.

=Sinus.= The angle between two lobes or divisions.

=Spadix.= A short fleshy spike.

=Spathe.= A large bract or pair of bracts enclosing a flower-cluster.

=Spatulate.= Shaped like a spatula, with a narrow base and an enlarged, more or less rounded summit.

=Spike.= An elongated flower-cluster having sessile flowers upon an unbranched axis.

=Spike-like.= Resembling a spike.

=Spinulose-serrate.= Provided with teeth tipped with minute spines.

=Spur.= A hollow projection from the calyx or corolla, usually slender in shape, and generally directed backward.

=Stamen.= One of the organs of a flower, consisting of a filament and anther.

=Staminate.= Bearing stamens.

=Stolon.= A short stem arising from the base of a plant, prostrate or nearly so, and eventually taking root.

=Striate.= Marked with fine stripes or ridges.

=Style.= A portion of the pistil, usually slender, and connecting the ovary and stigma.

=Superior.= A superior ovary occupies the center of the flower and is not attached to any other floral organs.

=Subtending.= Situated at the base of an organ.

=Subulate.= Awl-shape.

=Ternately.= Divided by threes.

=Tomentose.= Densely hairy with matted or tangled hairs.

=Trifoliate.= With three leaflets.

=Truncate.= Cut straight across at the tip, or nearly so.

=Tube.= The more or less cylindrical portion of a gamosepalous calyx or a gamopetalous corolla, distinguished from the expanded or lobed terminal portion.

=Tubular.= Shaped like a tube.

=Twice-pinnate.= Same as bipinnate.

=Two-lipped.= A calyx or corolla in which the upper half is decidedly different in size or shape from the lower.

=Umbel.= A flower-cluster with several or many pedicelled flowers all arising from the same point.

=Undulate.= With a wavy margin.

=Viscid.= Sticky.

=Villous.= With long soft hairs.

=Whorl.= An arrangement of 3 or more leaves or flowers in a circle around a node.

=Whorled.= In a whorl.

=Wing.= A thin flat expansion on the sides or edge of an organ.

INDEX

Abies, 1

Abutilon, 72

Acalypha, 66

Acanthaceae, 107

Acanthus Family, 107

Acer, 70

Aceraceae, 70

Acerates, 90

Achillea, 130, 131

Acnida, 30

Acorus, 8

Actaea, 39

Actinomeris, 128

Adder's Mouth, 17

Adenocaulon, 118

Adlumia, 41

Aesculus, 70

Agastache, 97

Agrimonia, 55

Agrimony, 55

Agropyron, 6

Agrostemma, 33

Agrostis, 6

Ailanthus, 65

Aizoaceae, 31

Alder, 22

Alder, Black, 69

Aletris, 13

Alfalfa, 61

Alisma, 3

Alismaceae, 3

Allium, 13

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, 69

Black Ash, 88

Blackberry, 53

Black Bindweed, 28

Black Cherry, 54

Black Currant, 49, 50

Black-eyed Susan, 128

Black Haw, 111

Black Jack Oak, 22

Black Locust, 58

Black Maple, 70

Black Medick, 60

Black Mustard, 44

Black Oak, 23

Black Raspberry, 53

Black Snakeroot, 82

Black Spruce, 1

Black Swallow-wort, 90

Black Walnut, 21

Black Willow, 20

Bladder Campion, 34

Bladder Nut, 69

Bladder Nut Family, 69

Bladderwort, 106

Bladderwort Family, 105

Blazing Star, 13, 121

Blephilia, 96

Blite, 29

Bloodroot, 41

Bloody Dock, 26

Blue Ash, 88

Bluebell, 93, 94

Blueberry, 86

Blue Cohosh, 40

Blue-eyed Grass, 15

Blue-eyed Mary, 104

Blue Flag, 15

Blue Grass, 7

Blue Hearts, 104

Blue-joint, 5

Bluets, 108

Blue Violet, 76

Blueweed, 94

Boehmeria, 24

Bog Rosemary, 86

Boltonia, 131

Boneset, False, 122

Borage, 93

Borage Family, 93

Boraginaceae, 93

Borago, 93

Bowman's Root, 57

Box Elder, 70

Brasenia, 35

Brassica, 43, 44

Brauneria, 131

Braya, 47

Bristly Locust, 58

Bristly Sarsaparilla, 80

Brome-grass, 7

Bromus, 7

Broom-rape Family, 106

Buchnera, 104

Buckbean, 88

Buckeye, 70

Buckhorn, 107

Buckthorn, 71

Buckthorn Family, 71

Buckwheat, 27

Buckwheat, False, 28

Buckwheat Family, 25

Buffalo Berry, 77

Buffalo Bur, 100

Buffalo Clover, 61

Bugbane, 39

Bugle, 98

Bugle Weed, 95

Bug-seed, 28

Bulrush, 7

Bur Clover, 60

Bur Cucumber, 112

Burdock, 117

Bur Marigold, 124

Burnet, 57

Bur Oak, 23

Bur-reed, 2

Bur-reed Family, 2

Bush Clover, 61, 63

Bush Honeysuckle, 110

Butter-and-eggs, 102

Buttercup, 36, 37, 38

Butterfly Weed, 91

Butternut, 21

Butterwort, 105

Button Bush, 108

Cacalia, 122

Cactaceae, 77

Cactus Family, 77

Cakile, 45

Calamagrostis, 5

Calamint, 97

Calla, 9

Callirhoe, 73

Callitrichaceae, 68

Callitriche, 68

Calopogon, 16

Caltha, 36

Calypso, 17

Camassia, 14

Camelina, 42

Camomile, 130

Campanula, 112

Campanulaceae, 112

Campion, 33, 34

Canada Thistle, 118

Canada Violet, 76

Canadian Blue Grass, 7

Cancer-root, 106

Cannabis, 24

Caper Family, 47

Capparidaceae, 47

Caprifoliaceae, 109

Capsella, 46

Caraway, 83

Cardamine, 45, 47

Cardinal Flower, 113

Carduus, 118

Carex, 8

Carpet-weed, 31

Carpet-weed Family, 31

Carpinus, 21

Carrion-flower, 11

Carrot, Wild, 82

Carum, 83

Carya, 21

Caryophyllaceae, 31

Cashew Family, 68

Cassia, 60

Castalia, 35

Castanea, 22

Castilleja, 102

Catchfly, 33, 34

Catnip, 98

Cat-tail, 2

Cat-tail Family, 2

Caulophyllum, 40

Ceanothus, 71

Cedar, 1

Celandine, 41

Celandine Poppy, 41

Celastraceae, 69

Celastrus, 69

Celtis, 24

Cenchrus, 5

Centaurea, 121

Centaurium, 89

Centaury, 89

Cephalanthus, 108

Cerastium, 33

Ceratophyllaceae, 34

Ceratophyllum, 34

Cercis, 58

Chaerophyllum, 83

Chamaedaphne, 86

Chamaelirium, 13

Charlock, 44

Cheat, 7

Chelidonium, 41

Chelone, 104

Chenopodiaceae, 28

Chenopodium, 28, 29

Cherry, 54

Cherry, Ground, 101

Chervil, 83

Chestnut, 22

Chickweed, 32, 33

Chickweed, Mouse-ear, 33

Chicory, 115

Chimaphila, 85

Chiogenes, 85

Chives, Wild, 13

Chokeberry, 55

Choke Cherry, 54

Chrysanthemum, 121, 130, 131

Chrysosplenium, 50

Cichorium, 115

Cicuta, 82

Cimicifuga, 39

Cinquefoil, 52, 56, 57

Circaea, 78

Cirsium, 117, 118

Cistaceae, 74

Cladium, 8

Clammy Locust, 58

Clammy-weed, 47

Claytonia, 34

Clearweed, 24

Cleft Phlox, 92

Clematis, 35

Climbing Fumitory, 41

Climbing Rose, 52

Clintonia, 13

Clover, 61

Clover, Bush, 61, 63

Clover, Hop, 60

Clover, Prairie, 60

Clover, Sweet, 61

Cocklebur, 114

Cockle, Corn, 33

Coffee-tree, 58

Cohosh, Blue, 40

Colic-root, 13

Collinsia, 104

Collinsonia, 95

Coltsfoot, 122, 130

Columbine, 36

Comandra, 24

Comfrey, 93, 94

Commelina, 9

Commelinaceae, 9

Common Blue Violet, 76

Common Cat-tail, 2

Common Vetch, 59

Compass Plant, 127

Compositae, 113

Composite Family, 113

Coneflower, Gray-headed, 128

Coneflower, Purple, 131

Conioselinum, 83

Conium, 83

Conopholis, 106

Conringia, 42

Convolvulaceae, 91

Convolvulus, 91, 92

Coptis, 39

Corallorhiza, 16

Coral Root, 16

Coreopsis, 123, 124

Corispermum, 28

Cork Elm, 24

Cornaceae, 83

Corn Cockle, 33

Corn Flower, 121

Corn Gromwell, 94

Corn Salad, 111

Cornus, 83, 84

Corydalis, 42

Corylus, 22

Costmary, 121

Cotton Grass, 8

Cotton Thistle, 118

Cottonwood, 19

Cowbane, 81

Cowherb, 34

Cow Parsnip, 82

Cowslip, 36

Cow Wheat, 104

Crab, 54

Crab Grass, 5

Crack Willow, 20

Cranberry, 85

Cranberry Tree, 111

Crane-fly Orchis, 16

Crane's-bill, 64, 65

Crassulaceae, 48

Creeping Cedar, 1

Creeping Wahoo, 69

Crepis, 117

Cress, 43-47

Cress, Bitter, 45, 47

Cress, Field, 46

Cress, Garden, 45, 46

Cress, Lake, 45, 46

Cress, Mouse-ear, 47

Cress, Penny, 46

Cress, Rock, 46, 47

Cress, Water, 45

Cress, Winter, 44

Cress, Yellow, 43

Crotalaria, 59

Crowberry, 68

Crowberry Family, 68

Crowfoot, 35

Crowfoot, Cursed, 37

Crowfoot Family, 35

Crowfoot, Sea-side, 36

Crowfoot, Small-flowered, 36

Crowfoot, Water, 35, 37

Cruciferae, 42

Cryptotaenia, 82

Cuckoo Flower, 45

Cucurbitaceae, 112

Cudweed, 120, 121

Culver's Root, 104

Cup Plant, 123

Currant, 49, 50

Currant, Indian, 110

Cursed Crowfoot, 37

Cuscuta, 92

Custard Apple Family, 40

Cut-grass, 5

Cycloloma, 29

Cynanchum, 90

Cynoglossum, 93, 94

Cynthia, 115

Cyperaceae, 7

Cyperus, 8

Cypress Spurge, 67

Cypripedium, 18

Dactylis, 6

Daisy, Ox-eye, 131

Dalibarda, 56

Dame's Rocket, 47

Dandelion, 115

Dandelion, Dwarf, 115

Datura, 100

Daucus, 82

Day-flower, 9

Day Lily, 11

Dead Nettle, 99

Decodon, 77

Deerberry, 86

Dentaria, 44

Deptford Pink, 34

Desmodium, 62, 63

Devil's Club, 80

Dewberry, 53

Dianthera, 107

Dianthus, 34

Dicentra, 41

Diervilla, 110

Digitaria, 5

Dioscorea, 14

Dioscoreaceae, 14

Diplotaxis, 42, 43

Dipsacaceae, 112

Dipsacus, 112

Dirca, 77

Ditch Stonecrop, 49

Dock, 26

Dock, Prairie, 122

Dodder, 92

Dodecatheon, 87

Dogbane, 90

Dogbane Family, 90

Dog Fennel, 130

Dog Rose, 52

Dog's-tooth Violet, 12

Dog Violet, 76

Dogwood, 83, 84

Dogwood Family, 83

Downy Mint, 78

Draba, 42, 46

Dracocephalum, 96

Dragon Head, 96

Dragon Head, False, 99

Dragon Root, 8

Drop-seed, 5

Drosera, 48

Droseraceae, 48

Duckweed, 9

Duckweed Family, 9

Dulichium, 7

Dutchman's Breeches, 41

Dwarf Birch, 22

Dwarf Dandelion, 115

Dwarf Dogwood, 83

Dwarf Ginseng, 80

Dwarf Iris, 15

Dwarf Mistletoe, 25

Dwarf Raspberry, 53

Dwarf Water Plantain, 3

Dwarf White Trillium, 12

Dyer's Greenweed, 58

Echinochloa, 5

Echinocystis, 112

Echinodorus, 3

Echinops, 117

Echium, 94

Eel Grass, 3

Elaeagnaceae, 77

Elatinaceae, 74

Elatine, 74

Elder, 109

Elder, Box, 70

Elder, Marsh, 114

Elecampane, 127

Eleocharis, 7

Eleusine, 6

Elm, 24

Elodea, 3

Elymus, 6

Empetraceae, 68

Empetrum, 68

Enchanter's Nightshade, 78

English Plantain, 107

Epifagus, 106

Epigaea, 85

Epilobium, 79

Epipactis, 17

Eragrostis, 7

Erechtites, 122

Ericaceae, 84

Erigenia, 81

Erigeron, 130-132

Eriocaulaceae, 9

Eriocaulon, 9

Eriophorum, 8

Erodium, 64

Eryngium, 80

Erysimum, 43

Erythronium, 12

Eupatorium, 121, 122

Euphorbia, 67, 68

Euphrasia, 102

Evening Primrose, 78

Evening Primrose Family, 78

Everlasting, 120

Everlasting, Pearly, 120

Evonymus, 69

Eyebright, 102

Fagaceae, 22

Fagopyrum, 27

Fagus, 22

Fall Dandelion, 115

False Asphodel, 14

False Boneset, 122

False Buckwheat, 28

False Dragon Head, 99

False Flax, 42

False Foxglove, 102

False Gromwell, 93

False Heather, 74

False Loosestrife, 78

False Mermaid, 68

False Mermaid Family, 68

False Mitrewort, 51

False Nettle, 24

False Pimpernel, 104

False Solomon's Seal, 14

Fatsia, 80

Fennel, 81

Fennel, Dog, 130

Fescue Grass, 7

Festuca, 7

Feverfew, 130

Feverwort, 109

Field Cress, 46

Field Garlic, 13

Figwort, 103

Figwort Family, 101

Filipendula, 57

Fire Pink, 33

Fireweed, 79, 122

Five-finger, 55

Flax, 63

Flax, False, 42

Flax Family, 63

Fleabane, 131, 132

Floating Foxtail, 4

Floating Heart, 88

Floerkea, 68

Flowering Dogwood, 83

Flowering Raspberry, 54

Flowering Wintergreen, 65

Flower-of-an-hour, 72

Foeniculum, 81

Fog Fruit, 99

Forget-me-not, 94

Forked Chickweed, 31

Four-o'Clock Family, 31

Foxglove, False, 102

Fox Grape, 72

Foxtail, 4

Foxtail, Floating, 4

Fragaria, 56

Frasera, 88

Fraxinus, 88

Fringed Gentian, 89

Fringed Orchis, 19

Frog's Bit Family, 3

Frost Grape, 72

Frostweed, 74

Fumaria, 42

Fumariaceae, 41

Fumitory, 42

Fumitory, Climbing, 41

Fumitory Family, 41

Galeopsis, 99

Gale, Sweet, 21

Galinsoga, 130

Galium, 108, 109

Garden Cress, 45, 46

Garden Phlox, 92

Garlic, Field, 13

Gaultheria, 86

Gaura, 79

Gaylussacia, 86

Genista, 58

Gentian, 89

Gentiana, 89

Gentianaceae, 88

Gentian Family, 88

Gentian, Spurred, 89

Geraniaceae, 64

Geranium, 64, 65

Geranium Family, 64

Gerardia, 102, 103

Geum, 56, 57

Giant Hyssop, 97

Giant Ragweed, 114

Gillenia, 57

Ginseng, 80

Gleditsia, 58

Globe-flower, 36

Globe Thistle, 117

Glyceria, 7

Gnaphalium, 120, 121

Goat's Rue, 60

Golden Alexander, 81

Golden Currant, 49

Golden Glow, 128

Goldenrod, 125-127

Golden Saxifrage, 50

Golden Seal, 38

Gold-thread, 39

Good King Henry, 29

Gooseberry, 49

Goosefoot, 28, 29

Goosefoot Family, 28

Gourd Family, 112

Gramineae, 4

Grape, 72

Grape Family, 71

Grape Hyacinth, 14

Grass Family, 4

Grass of Parnassus, 50

Grass, Star, 14

Gratiola, 104

Gray-headed Coneflower, 128

Great Lobelia, 113

Great Solomon's Seal, 11

Great-spurred Violet, 75

Greek Valerian, 92

Green Ash, 88

Green Brier, 11

Green Foxtail, 4

Green Milkweed, 90

Green Sorrel, 25

Green Violet, 75

Grindelia, 128

Ground Cherry, 101

Ground Hemlock, 2

Ground Ivy, 98

Groundsel, 128

Gum Plant, 128

Gymnocladus, 58

Gypsophila, 34

Gypsophyll, 34

Habenaria, 18, 19

Hackberry, 24

Hair Grass, 6

Halenia, 89

Haloragidaceae, 79

Hamamelidaceae, 51

Hamamelis, 51

Hand-leaf Violet, 75

Harbinger of Spring, 81

Hardhack, 53

Harebell, 112

Hare's Ear, 42

Hawksbeard, 117

Hawkweed, 116, 117

Hazel, 22

Heather, False, 74

Heath Family, 84

Hedeoma, 95

Hedge Hyssop, 104

Hedge Mustard, 44

Hedge Nettle, 99

Helenium, 127, 128

Helianthemum, 74

Helianthus, 128-130

Heliopsis, 123

Hemerocallis, 11

Hemlock, 1

Hemlock, Ground, 2

Hemlock Parsley, 83

Hemlock, Poison, 83

Hemlock, Water, 82

Hemp, 24

Hemp, Indian, 90

Hemp Nettle, 99

Hemp, Water, 30

Hemp Weed, 131

Henbane, 101

Hepatica, 38

Heracleum, 82

Herb Robert, 64

Herb Sophia, 43

Hercules' Club, 80

Hesperis, 47

Heteranthera, 10

Heuchera, 50, 51

Hibiscus, 72

Hickory, 21

Hieracium, 116, 117

Hill's Oak, 23

Hippuris, 79

Hoarhound, 96

Hoarhound, Water, 95

Hobble-bush, 111

Hog Peanut, 59

Holly Family, 69

Holly, Mountain, 69

Honewort, 82

Honey Locust, 58

Honeysuckle, 110

Honeysuckle, Bush, 110

Honeysuckle Family, 109

Hop, 24

Hop Clover, 60

Hop Tree, 65

Hordeum, 4

Hornbeam, 21

Horned Pondweed, 2

Hornwort, 34

Hornwort Family, 34

Horse Balm, 95

Horse Chestnut, 70

Horse Mint, 96

Horse Nettle, 100

Horse Radish, 46

Horse Weed, 130, 131

Hound's Tongue, 93

Houstonia, 108

Huckleberry, 86

Hudsonia, 74

Humulus, 24

Hyacinth, Wild, 14

Hybanthus, 75

Hydrocharitaceae, 3

Hydrocotyle, 80

Hydrophyllaceae, 93

Hydrophyllum, 93

Hyoscyamus, 101

Hypericaceae, 73

Hypericum, 73, 74

Hypoxis, 14

Hyssop, 98

Hyssop, Hedge, 104

Hyssopus, 98

Ilex, 69

Illecebraceae, 31

Ilysanthes, 104

Impatiens, 71

Imperatoria, 82

Indian Cucumber-root, 13

Indian Currant, 110

Indian Hemp, 90

Indian Mustard, 44

Indian Pipe, 84

Indian Plantain, 122

Indian Tobacco, 113

Indian Turnip, 8

Indigo, Wild, 61

Inula, 127

Ipomoea, 92

Iridaceae, 15

Iris, 15

Iris Family, 15

Ironweed, 122

Ironweed, Yellow, 128

Ironwood, 22

Isopyrum, 39

Iva, 114

Jack Pine, 1

Jeffersonia, 40

Jerusalem Artichoke, 129

Jerusalem Oak, 29

Jimson Weed, 100

Joe-Pye Weed, 122

Jointweed, 27

Juglandaceae, 21

Juglans, 21

Juncaceae, 10

Juncaginaceae, 3

Juncus, 10

Juneberry, 55

Juniper, 1

Juniperus, 1

Kalmia, 85

Kenilworth Ivy, 103

Kentucky Coffee-tree, 58

King-nut Hickory, 21

Knapweed, 121

Knawel, 31

Knotweed, 26, 27

Knotwort Family, 31

Kochia, 28

Koeleria, 6

Krigia, 115

Kuhnia, 122

Labiatae, 95

Labrador Tea, 85

Lactuca, 115, 116

Ladies' Tresses, 16

Lady's Slipper, 18

Lake Cress, 45, 46

Lamb's Quarters, 29

Lamium, 99

Laportea, 24

Lappula, 94

Lapsana, 115

Large-toothed Aspen, 19

Larix, 1

Larkspur, 36

Lathyrus, 59

Lauraceae, 41

Laurel Family, 41

Lead Plant, 58

Leafcup, 123

Leatherleaf, 86

Leatherwood, 77

Lechea, 74, 75

Ledum, 85

Leek, Wild, 13

Leersia, 5

Leguminosae, 58

Lemna, 9

Lemnaceae, 9

Lentibulariaceae, 105

Leontodon, 115

Leonurus, 98

Lepachys, 128

Lepidium, 45, 46

Lespedeza, 61, 63

Lettuce, 115, 116

Lettuce, Wild, 115, 116

Liatris, 121

Lilac, 88

Liliaceae, 10

Lilium, 12

Lily, 12

Lily Family, 10

Lily of the Valley, Wild, 12

Lily, Pond, 35

Lily, Water, 35

Limnanthaceae, 68

Limosella, 103

Linaceae, 63

Linaria, 102, 103

Linden Family, 72

Linnaea, 109

Linum, 63

Liparis, 17

Lippia, 99

Liriodendron, 40

Listera, 17

Lithospermum, 94

Live-for-ever, 49

Lizard's Tail, 19

Lobelia, 113

Lobeliaceae, 113

Lobelia Family, 113

Locust, 58

Locust, Honey, 58

Lombardy Poplar, 19

Long-spurred Violet, 76

Lonicera, 110

Loosestrife, 77, 87, 88

Loosestrife, False, 78

Loosestrife Family, 77

Lopseed, 107

Lopseed Family, 107

Loranthaceae, 25

Lotus, 35

Lousewort, 102

Love Grass, 7

Love-in-a-mist, 38

Low Juniper, 1

Ludvigia, 78

Lupine, 59

Lupinus, 59

Luzula, 10

Lychnis, 33

Lysimachia, 87, 88

Lycium, 100

Lycopus, 95

Lythraceae, 77

Lythrum, 77

Madder Family, 108

Mad-dog Skullcap, 96

Magnoliaceae, 40

Magnolia Family, 40

Maianthemum, 13

Mallow, 73

Mallow Family, 72

Mallow, Marsh, 72

Mallow, Poppy, 73

Mallow, Rose, 72

Mallow, Virginia, 73

Malva, 73

Malvaceae, 72

Manna Grass, 7

Maple, 70

Maple Family, 70

Mare's-tail, 79

Marigold, Bur, 124

Marigold, Water, 123

Marrubium, 96

Marsh Cinquefoil, 57

Marsh Elder, 114

Marsh Harebell, 112

Marsh Mallow, 72

Marsh Pea, 59

Marsh Speedwell, 105

Masterwort, 82

Matricaria, 130

Matrimony Vine, 100

May Apple, 40

Meadow Beauty, 77

Meadow Parsnip, 81

Meadow Pink, 34

Meadow Rue, 39

Meadow Salsify, 115

Meadow-sweet, 53

Medeola, 13

Medicago, 60, 61

Melampyrum, 104