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Table 4. TRENDS IN MEAN COVER FOR THE PORTION OF THE RECLAIMED AREA SEEDED <br />IN OCTOBER, 1988. WALDEN COAL PROJECT SITE. BASED ON DATA <br />COLLECTED IN JULY, 1989-1992. MEAN COVER VALUES ARE IN PERCENT. <br />Species 1989 1990 1991 1992 <br />Sample Size 14 14 14 14 <br />COOL SEASON PERENNIAL GRASSES <br />Agropyron dasystachyum 6.57 17.57 9.86 18.43 <br />Agroetie ecabra 0.00 0.01 0.00 0.00 <br />Agropyron smithii 2.29 3.57 1.57 0.57 <br />Agropyron spicatum 0.00 0.01 0.01 0.01 <br />Agropyron trachycaulum 0.00 0.00 0.00 0.14 <br />Deschampsia caespitosa 0.00 0.01 0.00 0.00 <br />Hordeum jubatum 0.00 0.01 0.01 0.01 <br />Oryzopeie hymenoides 0.00 0.01 0.01 0.01 <br />Stipa viridula 0.43 0.00 0.00 0.01 <br />Subtotal 9.29 21.19 11.46 19.18 <br />INTRODUCED PERENNIAL GRASSES <br />Agropyron cristatum 0.00 0.01 0.00 0.01 <br />Alopecurus pratensis 0.00 3.00 0.01 1.29 <br />Bromus inermis 0.00 0.00 0.00 0.01 <br />Elymua junceus 0.14 3.43 3.86 9.57 <br />Festuca ovina 0.00 2.14 2.86 0.01 <br />Subtotal 0.14 8.58 6.72 10.89 <br />ANNUAL GRASSES <br />Hromue tectorum 0.00 0.01 0.00 0.00 <br />Subtotal 0.00 0.01 0.00 0.00 <br />PERENNIAL FORBS <br />Achillea lanulosa 0.14 0.01 0.01 0.00 <br />Astragalus cicer 0.00 0.01 0.00 0.00 <br />Penstemon strictus 0.00 0.01 0.01 0.01 <br />Subtotal 0.14 0.03 0.02 0.01 <br />ANNUAL AND BIENNIAL FORBS <br />Carduva nutans ssp.macrolepis 0.00 0.00 0.01 0.00 <br />Chenopodium atrovirens 1.57 0.01 0.01 0.00 <br />Chenopodium berlandieri 4.43 2.57 0.00 0.00 <br />Descurainia richardsonii 0.00 0.01 0.00 0.01 <br />Kochia scoparia 0.00 0.01 0.00 0.00 <br />Salsola kali 0.57 0.71 0.43 0.00 <br />Sisymbrium altiseimum 0.00 0.01 0.00 0.01 <br />Solanum triflorum 0.00 0.00 0.00 0.01 <br />Subtotal 6.57 3.33 0.45 0.03 <br />SEMI-SHRUBS OR HALF-SHRUBS <br />Artemisia frigida 0.00 0.01 0.01 0.01 <br />Subtotal 0.00 0.01 0.01 0.01 <br />-12- <br />