about twice as long as broad, with regular curved
outlines, broadly elliptical.

O'VATE, like a longitudinal section of an ordinary hen's egg,
with the attachment, if any, at the broad end.

O'VOID, the shape of a hen's egg and attached, if at all, at the
large end.

Ovoid spike rush, 118

Ox-eye daisy, 163

Oyster-plant, 170

Paint brush, 167

PA'LE-A, PA'LET, the upper bract which with the floral glume
incloses the flower in grasses.

Pale persicaria, 120

Panicum, 113

Panicum capillare, 115

Panicum, smooth, 115

Papaveraceae, 132

Parsley family, 148

Parsnip, wild, 149

Pastinaca, 149

Patience dock, 123

Pennsylvania persicaria, 120

Penny cress, 137

Peppergrass, 135, 136

Persicaria, dock-leaved, 120

Pigeon grass, 117

Pigweed, 124

Pigweed family, 124

Pink family, 128

Plantago, 158, 159

Plantain family, 158

Poa annua, 116

Poa compressa, 116

Poa, flat-stemmed, 116

Poa pratensis, 116

Poison hemlock, 148

Poison ivy, 145

Polygonaceae, 119

Polygonum, 119-120

Poppy family, 132

Porcupine grass, 117

Portulaca, 131

Portulacaceae, 131

Potentilla, 138, 139

Prickly lettuce, 168

Prickly sida, 146

Prostrate amaranth, 127

Prunella, 155

PU-BES'CENT, clothed with soft and rather short hairs.

Pulse family, 139

Purple Jimsonweed, 155

Purple-stemmed beggar-ticks, 163

Purslane family, 131

Purslane speedwell, 157

Pusley, 131

Quack grass, 110

Ragweed, 160

Ranunculaceae, 131

Ranunculus, 131, 132

RA'PHE, the adherent funiculus connecting the hilum and chalaza
in anatropous or amphitropous ovules or seeds.

Red clover, 141

Red-seeded dandelion, 170

Red root, 153

RE-TIC'U-LATE, in the form of network.

Rhus, 145

Rib-grass, 158

Rocket, yellow, 133

ROOT, the descending axis which is destitute of leaves or nodes.

ROOT STOCK, rhizome, a stem usually subterranean and more or
less thickened, producing young branches.

Rosaceae, 138

Rose family, 138

Rough cinquefoil, 139

Rough pigweed, 127

Rudbeckia, 169

Rugel's broad-leaved plantain, 159

Rumex, 121, 122, 123

Running mallow, 146

Rush family, 118

Rush, slender, 118

Rush, spike, 118

Russian thistle, 126

Rutabaga, 133

Rye,