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Table 6. TRENDS IN MEAN COVER FOR THE RECLAIMED AREA AT THE WALDEN COAL <br />PROJECT SITE. BASED ON DATA COLLECTED BETWEEN 1989 AND 1993. <br />MEAN COVER VALUES AAE IN PERCENT. <br />Species 1989 1990 1991 1992 1993 <br />Sample Size 20 20 20 20 20 <br />COOL SEASON PERENNIAL GRASSES <br />Agropyron dasystachyum 7.40 15.20 8.70 15.40 17.40 <br />Agrostis scabra 0.00 0.01 0.00 0.00 0.00 <br />Agropyron emithii 1.90 2.70 1.10 0.40 0.90 <br />Agropyron spicatum 0.00 0.01 0.01 0.01 0.01 <br />Agropyron trachycaulum 0.00 0.00 0.00 0.10 0.00 <br />Deechampsia caeepitoea 0.00 0.01 0.00 0.00 0.00 <br />Festuca idahoeneie 0.00 0.00 0.00 0.00 0.80 <br />Hordeum brachyantherum 0.00 0.10 0.00 0.00 0.00 <br />Hordeum jubatum 0.00 0.01 0.01 0.01 0.00 <br />Roeleria macrantha 0.00 0.00 0.00 0.00 0.01 <br />Oryzopeis hymenoides 0.00 0.01 0.01 0.01 0.01 <br />Poa ampla 0.70 0.00 0.00 0.00 0.10 <br />Stipa comata 0.00 0.00 0.00 0.10 0.00 <br />Stipa Viridula 2.10 1.00 0.01 1.30 0.20 <br />Subtotal 12.10 19.05 9.84 17.33 19.43 <br />INTRODUCED PERENNIAL GRASSES <br />Agropyron cristatum 0.00 0.01 0.00 0.01 0.10 <br />Agropyron intermedium 0.00 0.00 0.00 0.10 0.01 <br />Alopecurus prateneis 0.00 2.10 0.01 0.90 0.70 <br />Bromus inermis 0.00 0.00 0.00 0.01 0.00 <br />Elymus junceue 0.20 2.90 2.80 7.20 6.95 <br />Festuca ovina 0.00 1.50 2.00 0.01 0.30 <br />Poa prateneie 0.00 0.10 0.01 0.00 0.01 <br />Subtotal 0.20 6.61 4.82 8.23 8.07 <br />ANNUAL GRASSES <br />Bromus tectorum 0.00 0.01 0.00 0.00 0.00 <br />Subtotal 0.00 0.01 0.00 0.00 0.00 <br />PERENNIAL FORBS <br />Achillea lanuloea 0.10 0.01 0.01 0.01 0.01 <br />Arabia sp. 0.00 0.00 0.00 0.00 0.01 <br />Aetragalue cicer 0.00 0.10 0.00 0.00 0.01 <br />Aetragalue crassicarpus 0.00 0.01 0.00 0.00 0.00 <br />Aetragalue kentrophyta 0.00 0.00 0.01 0.00 0.00 <br />Eryeimum asperum 0.00 0.01 0.00 0.00 0.00 <br />Penetemon etrictue 0.00 0.01 0.01 0.01 0.01 <br />Aumex ealicifolius 0.00 0.00 0.01 0.00 0.01 <br />Subtotal 0.10 0.14 0.04 0.02 0.05 <br />ANNUAL AND BIENNIAL FORBS <br />Carduue nutane eep.macrolepie 0.00 0.00 0.01 0.00 0.00 <br />Chenopodium atrovirens 1.10 0.01 0.01 0.00 0.00 <br />Chenopodium berlandieri 3.10 1.80 0.00 0.00 0.00 <br />Chenopodium pratericola 0.00 0.01 0.00 0.00 0.00 <br />Descurainia richardsonii. 0.00 0.01 0.00 0.01 0.00 <br />Rochia scoparia 0.00 0.01 0.00 0.00 0.00 <br />Machaeranthera canescene 0.00 0.00 ~ 0.00 0.01 0.01 <br />Saleola kali 0.40 0.50 0.30 0.00 0.00 <br />Sieymbrium altiesimum 0.00 0.01 0.00 0.01 0.00 <br />Solanum triflorum 0.00 0.00 0.00 0.01 0.00 <br />Subtotal 4.60 2.35 0.32 0.04 0.01 <br />-15- <br />