Quincula lobata. 90
Rabbit tobacco. 258
Ranunculus scleratus. 45
Ratibida columnifera. 124
Ratibida tagetes . 125
Rayless thelesperma. 184
Red horned poppy . 12
Red-seeded plantain. 265
Riddell ragwort. 136
Rock sandwort. 44
Rocky mountain zinnia. 129
Rose-ring gaillardia, Indian blanket flower. 153
Rough false dandelion. 176
Roundleaf Monkey-flower. 238
Rumex venosus. 250
Rush skeleton plant. 181
Rusty lupine. . 208