Part 19

Centaurea, 163

Centimeter, see ruled lines on last page, 183

Cerastium, 129

Chaetochloa, 117

Charlock, 133

Cheat, 112

Cheeses, 146

Chelidonium, 132

Chenopodiaceae, 124

Chenopodium, 124, 125, 126

Chess, barren, field, smooth, soft, 111

Chickory, 164

Chickweed, 129, 131

Chrysanthemum, 163

Cichorium, 164

Cicuta, 148

Cinquefoil, silvery, 138, 139

Cirsium, 164, 165

Claviceps, 110

Climbing false buckwheat, 121

Clover dodder, 151

Cockle, 128

Cocklebur, 171

CO'MA, a tuft of hair on a seed.

Common chickweed, 131

Common milkweed, 149

Common speedwell, 157

Compositae, 160