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<br />Soil Investigations for Data Collection in the Delta <br />Initial Study/Proposed Mitigated Negative Declaration 121 <br />Central Valley, and South Coast Ranges (CNPS 2019, Jepson Flora Project <br />2019). It typically grows in valley and foothill grassland and vernal pools (CNPS <br />2019). The microhabitat for adobe navarretia includes clay soils and sometimes <br />serpentine (CDFW 2019). Threats to this species include grazing (CNPS 2019). <br />Potentially suitable habitat for adobe navarretia is present within the Study Area. <br />However, this species has low potential to occur within the Study Area because <br />the Study Area is located on the edge of its known range and vernal pools will be <br />avoided so potential impacts would be less than significant. <br />Implementation of Mitigation Measures MM BIO-1b, MM BIO-12, MM BIO-18, <br />and MM BIO-19 would further avoid, minimize and/or reduce the potential for <br />impacts to adobe navarretia. <br />Shining navarretia (Navarretia nigelliformis ssp. radians) <br />Shining navarretia has a CRPR of 1B.2 but it is not listed under FESA or CESA. <br />This species is an annual herb in the phlox family, and it blooms from April to <br />July, and sometimes in March (CNPS 2019). It is endemic to California, and its <br />current range includes the Central Valley, southern Sierra Nevada Foothills, and <br />South Coast Ranges (CNPS 2019, Jepson Flora Project 2019). It typically grows <br />in cismontane woodland, vernal pools, and valley and foothill grassland. Threats <br />to this species include development, grazing, and competition from non-native <br />plants (CNPS 2019). This species has moderate potential to occur within the <br />Study Area based on the presence of potentially suitable habitat. <br />Implementation of Mitigation Measures MM BIO-1b, MM BIO-12, MM BIO-18, <br />and MM BIO-19 would reduce potential impacts to shining navarretia to: Less <br />than Significant with Mitigation Incorporated. <br />Prostrate vernal pool navarretia (Navarretia prostrata) <br />Prostrate vernal pool navarretia has a CRPR of 1B.1 but is not listed under FESA <br />or CESA. This species is an annual herb in the phlox family, and it blooms from <br />April to July (CNPS 2019). It is endemic to California, and its current range <br />includes the western San Joaquin Valley, Central Coast, San Francisco Bay <br />Area, South Coast Ranges, central South Coast, and Peninsular Ranges (CNPS <br />2019, Jepson Flora Project 2019). It typically grows in coastal scrub, meadows <br />and seeps, valley and foothill grassland, and vernal pools (CNPS 2019). The <br />microhabitat for prostrate vernal pool navarretia includes mesic sites with alkaline <br />soils (CDFW 2019). Threats to this species include vehicles, road maintenance, <br />and recreational activities (CNPS 2019). Potentially suitable habitat for prostrate <br />vernal pool navarretia 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 and vernal pools will be avoided so <br />potential impacts would be less than significant.