| Scientific Name | Life Formb | Life Spanc | Class Ia (n = 72) | Class II (n = 42) | Class III (n = 34) | ||||
| Frequencyd (%) | Covere (%) | Frequency (%) | Cover (%) | Frequency (%) | Cover (%) | ||||
Medicago sativa ssp. falcata (L). Arcang.* | F | P | 0.00 | 0.00 | 100 | 11.79 | 100 | 71.75 | |
| Pascopyrum smithii (Rydb.) Á. Löve | G | P | 80 | 10.03 | 69 | 11.89 | 50 | 1.04 | |
| Melilotus officinalis (L.) Lam.* | F | B | 61 | 1.89 | 76 | 1.93 | 37 | 0.04 | |
| Carex filifolia Nutt. | G | P | 59 | 21.68 | 35 | 7.86 | - | - | |
| Koeleria macrantha (Ledeb.) Schult. | G | P | 37 | 0.58 | 22 | 0.34 | - | - | |
| Plantago elongate Pursh | F | A | 37 | 1.27 | 22 | 0.83 | 38 | 0.63 | |
| Agropyron cristatum (L.) Gaertn.* | G | P | 36 | 6.53 | 63 | 0.53 | 88 | 7.13 | |
| Hesperostipa spp.f | G | P | 32 | 1.25 | 18 | 0.26 | - | - | |
| Poa pratensis L.* | G | P | 31 | 3.36 | 51 | 3.36 | 38 | 3.76 | |
| Bromus arvensis L.* | G | A | 25 | 0.34 | 31 | 0.14 | 13 | 0.01 | |
| Lactuca tatarica (L.) C.A. Mey. Var. pulchella (Pursh) Breitung | F | A | 22 | 0.08 | 6 | 0.03 | 13 | 0.06 | |
| Plantago patagonica Jacq. | F | A | 22 | 0.06 | 8 | 0.03 | - | - | |
| Bouteloua gracilis (Willd. ex Kunth) Lag. ex Griffiths | G | P | 20 | 0.61 | 8 | 0.01 | - | - | |
| Calamovilfa longifolia (Hook.) Scribn. | G | P | 20 | 2.65 | 2 | 0.10 | 25 | 0.14 | |
| Phlox hoodii Richardson | F | P | 20 | 0.12 | 14 | 0.07 | - | - | |
| Sphaeralcea coccinea (Nutt._ Rydb. | F | P | 20 | 0.11 | 22 | 0.06 | - | - | |
| Artemisia dracunculus L. | F | P | 19 | 0.31 | 2 | 0.02 | - | - | |
| Erysimum asperum (Nutt.) DC. | F | B | 19 | 0.11 | 2 | 0.00g | - | - | |
| Grindelia squarrosa (Pursh) Dunal | F | A | 19 | 0.50 | 27 | 1.30 | 13 | 0.01 | |
| Vicia Americana Muhl. ex Willd. | F | P | 19 | 1.19 | 10 | 0.01 | - | - | |
| Achillea millefolium L. | F | P | 17 | 0.25 | 43 | 0.69 | 50 | 0.16 | |
| Artemisia frigida Willd. | F | P | 17 | 0.12 | 10 | 0.05 | - | - | |
| Taraxacum officinale F.H. Wigg * | F | P | 17 | 0.02 | 6 | 0.01 | - | - | |
| Opuntia fragilis (Nutt.) Haw | Su | P | 15 | 0.02 | 2 | 0.00 | - | - | |
| Bouteloua dactyloides (Nutt.) J.T. Columbus | G | P | 14 | 0.16 | 6 | 0.06 | - | - | |
| Camelina microcarpa Andrz. ex. DC.* | F | A | 14 | 0.01 | 49 | 0.49 | 50 | 0.29 | |
| Opuntia sp. | Su | P | 14 | 0.11 | 2 | 0.02 | - | - | |
| Cirsium undulatum (Nutt.) Spreng. | F | P | 12 | 0.09 | 14 | 0.11 | - | - | |
| Tetraneuris acaulis (Pursh) Greene var. acaulis | F | P | 12 | 0.31 | 4 | 0.02 | - | - | |
| Artemisia ludoviciana Nutt. | F | P | 10 | 0.46 | 8 | 0.23 | 13 | 0.01 | |
Lygodesmia juncea (Pursh) D. Don ex Hook. | F | P | 10 | 0.01 | 6 | 0.01 | - | - | |