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the genera with highest number of species were: muhlenbergia (37), dalea (22), euphorbia (21), cheilanthes (19), brickellia (17), salvia (15), cyperus (14), quercus (13), solanum (12), eragrostis (12), bouteloua (12), erigeron (12), astragalus (11), ipomoea (11), plantago (10), acacia (10), machaeranthera (9), stevia (9), opuntia (9), aristida (9), asclepias (9), phaseolus (9), oenothera (9), viguiera (9) and notholaena (9).
los géneros con mayor número de especies son muhlenbergia (37), dalea (22), euphorbia (21), cheilanthes (19), brickellia (17), salvia (15), cyperus (14), quercus (13), solanum (12), eragrostis (12), bouteloua (12), erigeron (12), astragalus (11), ipomoea (11), plantago (10), acacia (10), machaeranthera (9), stevia (9), opuntia (9), aristida (9), asclepias (9), phaseolus (9), oenothera (9), viguiera (9) y notholaena (9).