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Table 4. TRENDS IN MEAN COVER 1988. WALDEN COAL 1989 AND 1993. MEAN FOA THE PORTION OF THE RECLAIMED AREA SEEDED IN PROJECT SITE. BASED ON DATA COLLECTED BETWEEN COVER VALUES ARE IN PERCENT. Species 1989 1990 1991 1992 1993 Sample Size 14 14 14 14 14 COOL SEASON PERENNIAL GRASSES Agropyron dasystachyum 6.57 17.57 9.86 18.43 20.00 Aqrostis scabra 0.00 0.01 0.00 0.00 0.00 Agropyron emithii 2.29 3.57 1.57 0.57 0.57 Agropyron epicatum 0.00 0.01 0.01 0.01 0.01 Agropyron trachycaulum 0.00 0.00 0.00 0.14 0.00 Deschampeia caespitoea 0.00 0.01 0.00 0.00 0.00 Feetuca idahoensie 0.00 0.00 0.00 0.00 1.14 Hordeum jubatum 0.00 0.01 0.01 0.01 0.00 Roeleria macrantha 0.00 0.00 0.00 0.00 0.01 Oryzopsis hymenoides 0.00 0.01 0.01 0.01 0.01 Poa ampla 0.00 0.00 0.00 0.00 0.14 Stipa viridula 0.43 0.00 0.00 0.01 0.00 Subtotal 9.29 21.19 11.46 19.18 21.89 INTRODUCED PERENNIAL GRASSES Agropyron cristatum 0.00 0.01 0.00 0.01 0.14 Alopecurue pratensis 0.00 3.00 0.01 1.29 1.00 Bromue inermis 0.00 0.00 0.00 0.01 0.00 Elymus junceus 0.14 3.43 3.86 9.57 9.57 Festuca ovina 0.00 2.14 2.86 0.01 0.43 Subtotal 0.14 8.58 6.72 10.89 11.14 ANNUAL GRASSES Bromus tectorum 0.00 0.01 0.00 0.00 0.00 Subtotal 0.00 0.01 0.00 0.00 0.00 PERENNIAL FORBS Achillea lanulosa 0.14 0.01 0.01 0.00 0.00 Astragalue cicer 0.00 0.01 0.00 0.00 0.00 Penetemon strictus 0.00 0.01 0.01 0.01 0.01 Subtotal 0.14 0.03 0.02 0.01 0.01 ANNUAL AND BIENNIAL FORHS Carduus nutane eep.macrolepie 0.00 0.00 0.01 0.00 0.00 Chenopodium atrovirens 1.57 0.01 0.01 0.00 0.00 Chenopodium berlandieri 4.43 2.57 0.00 0.00 0.00 Descurainia richardeonii 0.00 0.01 0.00 0.01 0.00 Rochia acoparia 0.00 0.01 0.00 0.00 0.00 Saleola kali 0.57 0.71 0.43 0.00 0.00 Sisymbrium altieeimum 0.00 0.01 0.00 0.01 0.00 Solanum triflorum 0.00 0.00 0.00 0.01 0.00 Subtotal ~ 6.57 3.33 0.45 0.03 0.00 SEMI-SHRUBS OR HALF-SHRUBS Artemisia frigida 0.00 0.01 0.01 0.01 0.00 Subtotal 0.00 0.01 0.01 0.01 0.00 -11-