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PLANT SYMBOL ~***+~,~ FORBS COMMON NAME PESE11 SIDEBELLS PENSTEMON PETE9 GERMANDER PENSTEMON ASKEI NUTTALL KENTROPHYTA MILKVETCH . GEPA2 PARRY GERANIUM HEVI4 HAIRY GOLDASTER HYRI PINGUE HYMENOXYS PADE4 MATTED NAILWORT ASCHA PACIFIC ASTER SHRUBS AND HALF-SHRUBS TECA2 GRAY HORSEBRUSH CHVIS2 SMALL RABBITBRUSH ARFR4 FRINGED SAGEBRUSH POFR4 SHRUBBY CIN4UEFOIL YUGL SMALL SOAPWEED PESI SNOWBALL CACTUS GUSA2 BROOM SNAKEWEED Page 3 #232 SCIENTIFIC NAME 1/ COMP. PERCENT *+**~** PENSTEMON SECUNDIFLORUS 1 3 PENSTEMON TEUCRIOIDES 1 2 ASTRAGALUS KENTROPHYTA 1 2 IMPLEX GERANIUM PARRYI 1 2 HETEROTHECA VILLOSA 1 2 HYMENOXYS RICHARDSONII 1 2 PARONYCHIA DEPRESSA 1 2 ASTER CHILENSIS 0 1 ADSCENDENS TETRADYMIA CANESCENS 2 5 CHRYSOTHAMNUS 2 5 VISCIDIFLORUS STENOPHYLLUS ARTEMISIA FRIGIDA 2 5 POTENTILLA FRUTICOSA 1 3 YUCCA GLAUCA 2 2 PEDIOCACTUS SIMPSONII 0 1 GUTIERREZIA SARO7HRAE 0 1 1/ Names are according to National List of Scientific Plant Names SCS-TP-159. c. If ecological retrogression is cattle-induced, Indian ricegrass, mountain muhly, and Arizona Fescue decline relatively fast. Blue grams, needleandthread, bottlebrush squirreltail, and western wheatgrass initially increase, but with continued retrogression they also decline. With advanced retrogression, slimstem muhly and poor vigor blue grams become the dominant grasses. Forbs such as sidebells penstemon will decrease with heavy overgrazing. Other fortis, such as hairy goldaster, germander penstemon, matted nailwort, and Nuttall Kentrophyta milkvetch will increase. Shrubs such as gray horsebrush, small rabbitbrush, broom snakeweed, pingue hymenoxys, fringed sage, and small soapweed tend to increase into the available niches left by disappearing grass plants. d. Basal area (the area of ground surface covered by the perennial vegetation measured one inch above the soil) is approximately 15 percent.