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<br />Soil Investigations for Data Collection in the Delta <br />Initial Study/Proposed Mitigated Negative Declaration 98 <br />Implementation of Mitigation Measures MM BIO-18 and MM BIO-19 would <br />reduce potential impacts to California androsace to: Less than Significant with <br />Mitigation Incorporated. <br />Depauperate milk-vetch (Astragalus pauperculus) <br />Depauperate milk-vetch has a CRPR of 4.3, but it is not listed under FESA or <br />CESA. This species is an annual herb in the pea family, and it blooms from <br />March through June (CNPS 2019). It is endemic to California, and its current <br />range includes the Cascade Range, northern Sierra Nevada Foothills, and <br />northern Sacramento Valley (CNPS 2019; Jepson Flora Project 2019). It typically <br />grows in chaparral, cismontane woodland, and valley and foothill grassland <br />(CNPS 2019). The microhabitat for depauperate milk-vetch includes vernally <br />mesic sites, stony flats and shallow depressions, and thin soils of red sand or <br />clay of volcanic origin (CDFW 2019). Depauperate milk-vetch is threatened by <br />vehicles and non-native plants (CNPS 2019). Potentially suitable habitat for <br />depauperate milk-vetch is present within the Study Area. However, this species <br />has low potential to occur within the Study Area because the Study Area is <br />located on the edge of its known range. <br />Implementation of Mitigation Measures MM BIO-18 and MM BIO-19 would <br />reduce potential impacts to depauperate milk-vetch to: Less than Significant with <br />Mitigation Incorporated. <br />Ferris' milk-vetch (Astragalus tener var. ferrisiae) <br />Ferris’s milk-vetch has a CRPR of 1B.1, but it is not listed under FESA or CESA. <br />This species is an annual herb in the pea family, and it blooms from April through <br />May (CNPS 2019). It is endemic to California, and its current range includes the <br />Sacramento Valley (CNPS 2019; Jepson Flora Project 2019). It is presumed <br />extirpated from Solano County. It typically grows in meadows and seeps and <br />valley and foothill grasslands (CNPS 2019). The microhabitat for Ferris’s milk- <br />vetch includes subalkaline flats on overflow land in the Central Valley, usually on <br />dry, adobe soil (CDFW 2019). The majority of this species’ habitat has been <br />impacted by agriculture (CNPS 2019). This species has moderate potential to <br />occur within the Study Area based on the presence of potentially suitable habitat <br />therefore potential impacts would be Less than Significant with Mitigation <br />Incorporated. <br />Implementation of mitigation measures MM BIO-1b, MM BIO-18 and MM BIO-19 <br />would reduce potential impacts to Ferris’ milk-vetch to: Less than Significant with <br />Mitigation Incorporated. <br />Alkali milk-vetch (Astragalus tener var. tener) <br />Alkali milk-vetch has a CRPR of 1B.1, but it is not listed under FESA or CESA. <br />This species is an annual herb in the pea family, and it blooms from March <br />through June (CNPS 2019). It is endemic to California, and its current range