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Table 7-1. Herbaceous canopy cover, aboveground primary production and woody stem densities <br />by species for plants encountered on postmine vegetation plots (Derringer Pit) relop- <br />soiled but not seeded in 1989 (1991 sampling season). <br />Woody <br />I~te Plant Common Corer Produttion Density <br />Form Speties Charatteristic Name (%) (Mlac) (stcros/ac) <br />Grasses Agropyron intermedium PIG Intermediate Wheatgtass <1 26 <br /> Agropyron smilhii PNG Western Wheatgrass 1 <br /> Agmpyron trachypulum PNG Slender Wheatgrau 1 <br /> Agropyron lrichophornm PIG Pubescent Whealgrass 1 <br /> Bromus inermis PIG Smooth Brome 2 2 <br /> Bromus japonicas AIG ]apanex Brome <i 11 <br /> Bmmus marginatus PNG Mountain Bmme 4 42 <br /> Bromus tectorum AIG Cheatgrass <I 20 <br /> Elymus cinercus PNG Basin Wildrye <1 <br /> Poa pratensis PIG Kentucky Bluegrass 15 5 <br /> Poa spp PNG Bluegrass <] <br /> Sfipa spp PNG Needlegrass <1 <br />Forbs Achilles millefoliam PNF Western Yarrow <] T <br /> Allium acuminatum PNF Tapcr Tip Onioo <1 T <br /> Aster Chilensis PNF Pacific Aster <I 1I <br /> Astragalus cicer PIF Cicer Milkvelch 4 T <br /> Chenopodium album AlF Lambsquaners <1 T <br /> Chorispora Ienella AIF Blue Mustard <1 T <br />• Descurainia pinnate ANF Pinnate Tansymuslard <1 S <br /> Epilobium paniculatum ANF Willowweed <1 6 <br /> Grindelia Squartcsa BNF Curly Cup Gumweed <3 6 <br /> Helianlhus pumilus PNF Pumilus Sunflower 1 1 <br /> Hydmphyllum capitalum PNF Ballhead Waterlea[ <1 T <br /> Kochia smparia AIF Summercypress <7 109 <br /> Lettuce xrriola BIF Prickly Ixttuce 8 277 <br /> Lappula redowski AIF Rcdowski Stickweed <1 T <br /> Melilaus officinalis BIF Yellow Sweetclwer <1 3 <br /> Polygonum spp A-PNF Knotweed <1 <br /> Polygonum aviculare AIF Knotweed <I 22 <br /> Salsola kali (ilxrica) AIF Russian Thistle 19 594 <br /> Sanguisorba minor P1F SmaII Burned <1 <br /> Sisymbrium altisxmum AIF Tumble Mustard 5 292 <br /> Stellaria spp ANF Chickweed <1 T <br /> Thlaspi arvenx A1F Feld Pennytress <1 46 <br /> Tragopoyon dubius B1F Western Salsify <1 6 <br />Shrubs Amelanchicr alnifolia NS Saskatoon Serviteberry <1 1 <br /> Artemisia tridentate NS Big Sagebrush <1 T ]4 <br /> Prunus virginiana NT Common Chokecherty <I 2 <br /> Purshia tridentate NS Antelope Bitterbrush el 2 <br /> Symphoricarpos oreophilus NS Mountain Snowberry <1 18 <br />Liner 12 <br />Bare Ground 23 <br />• Nole: Total herbaceous Canopy corer was 65 percent of which perennials rcprexnted 31 percent A total of 40 plan) species were <br />idenlitied in 1991 compared to 29 in 19'90. <br />W~63i92 iCMIRD\91REPT7] <br />