papilionaceous corolla; a
projecting ridge along the back of an organ.

Knawel, 128

Knot-grass, 119

Knotweed, 120

Knotweed family, 128

Labiatae, 154

Lactuca, 168

Lady's Thumb, 121

Lamb's quarters, 124

Lamium, 154

LAN'CE-O-LATE, tapering abruptly towards the base and gradually
towards the apex, like the head of a lance.

Lappula, 152

Large-bracted plantain, 158

Leafy spurge, 143

Leguminosae, 139

Leontodon, 168

Leonurus, 154

Lepidium, 136

Leptilon, 165

Liliaceae, 119

Lily family, 119

Linaria, 156

LIN'E-AR, very narrow with the margins parallel or nearly so.

Lithospermum, 153

Low cudweed, 166

Lucerne, 140

Lotus, 139

Low hop-clover, 141

Madder family, 159

Mallow, 145, 146

Mallow family, 145

Malva, 146

Malvaceae, 145, 146

Mammoth clover, 141

Many-seeded goosefoot, 126

Maple-leaved goosefoot, 125

Marsh elder, 167

Marubium, 154

May-weed, 161

Medicago, 139, 140

Melilotus, 140

Mexican tea, 125

Milfoil, 160

Milkweed, 149

Milkweed family, 149

Millimeter, see last page of this bulletin

Mint family, 154

m. m. Millimeter, see ruled lines on last page, 139

Mollugo, 128

Morning-glory family, 150

Mossy stonecrop, 138

Motherwort, 154

Moth mullein, 156

Mouse-ear chickweed, 129

Mouse-ear hawkweed, 167

Mullein, 156, 157

Musquash-root, 148

Mustard, 133, 134, 135

Mustard family, 132

Narrow-leaved dock, 122

Narrow-leaved hawk's beard, 165

Narrow-leaved plantain, 158

Nepeta, 154

Neslia, 137

Nettle family, 119

Nettle-leaved vervain, 153

Night-flowering catchfly, 130

Nightshade, 156

Night-shade family, 155

Nonesuch, 139

Nut-grass, 118

Oak-leaved goosefoot, 125

Oat, wild, 110

OB-LAN'CE-O-LATE, lanceolate in form, but tapering toward the
base more than toward the apex.

OB'LONG, longer than wide with nearly parallel sides. Compare
Oval.

OB-O'VATE, a flat body broader toward the apex than the base.
See Ovate.

OB-O'VOID, a solid body broader towards the apex than the base.
See Ovoid.

OB-TUSE', having a rounded end or apex; blunt.

Oenothera, 147

Old witch grass, 115

Onagraceae, 147

Orache, spreading, 124

Orpine family, 138

O'VAL,