More tnan 12 ray flowers longer than 1/4 in.

Leaves more than 1/2 in. wide
disk flowers yellow
147. Camphor weed. Heterotheca latifolia
150. Curlycup gumweed. Grindelia squarrosa var. squarrosa
151. Ciliate goldenweed. Haplopappus ciliatus
152. Maximilian sunflower. Helianthus maximilianii


disk flowers not yellow
153. Rose-ring gaillardia, Indian blanket flower. Gaillardia pulchella
154. Black sampson echinacea. Echinacea angustifolia
155. Prairie sunflower. Helianthus petiolaris
156. Common sunflower. Helianthus annuus
157. Plains coreopsis. Coreopsis tinctoria

Leaves less than 1/2 in. wide
many stem leaves
158. Baby white aster. Leucelene ericoides
159. Cutleaf ironplant. Haplopappus spinulosus
160. Western fleabane. Erigeron bellidiastrum
161. Golden aster. Chrysopsis villosa var. villosa
163. Fendler aster. Aster fendleri
164. Aromatic aster. Aster oblongifolius
165. White prairie aster. Aster falcatus
166. Heath aster. Aster ericoides


few stem leaves or all leaves at the base of the plant
168. Stemless townsendia. Townsendia exscapa
169. Plains daisy. Erigeron modestus
170. Trailing fleabane. Erigeron flagellaris
172. Aster. Aster subulatus var. ligulatus

More than 12 ray flowers 1/8-1/4 in.long

173. Yerba de tajo. Eclipta prostrata