Part 30

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, 116

Salsify, 170

Salsola, 126

Sand-bur, 112

Sand plantain, 158

Sand rocket, 135

Sandwort, 129

Saponaria, 129

Scarlet clover, 141

Scleria, 128