Water speedwell. 36
Water stargrass. 116
Watercress. 33
Wavyleaf microseris. 174
Wavyleaf thistle. 196
Western fleabane. 160
Western sagebrush, Prairie sagewort. 283
Western spotted beebalm. 232
Western wallflower . 13
White locoweed. 221
White penstemon. 230
White polygala. 268
White prairie aster. 165
White prickly poppy . 112
White sagebrush . 276
White sweetclover. 202
Wild alfalfa. 203
Wild bean vine. 205
Wild begonia . 250
Wild four-o'clock. 71
Wild licorice. 220
Wild onion. 108
Woolly indianwheat . 266
Woolly loco . 217
Yellow hymenoppapus. 182
Yellow nutrush. 264
Yellow sweetclover. 200
Yellow wood sorrel. 64
Yellow-spined thistle . 195
Yerba de tajo. 173
Yucca glauca. 110
Zinnia grandiflora. 129
Zosterella dubia. 116