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<br />Soil Investigations for Data Collection in the Delta <br />Initial Study/Proposed Mitigated Negative Declaration 109 <br />trampling, and non-native plants. This species has moderate potential to occur <br />within the Study Area based on the presence of potentially suitable habitat. <br />Implementation of Mitigation Measures MM BIO-18 and MM BIO-19 would <br />reduce potential impacts to recurved larkspur to: Less than Significant with <br />Mitigation Incorporated. <br />Dwarf downingia (Downingia pusilla) <br />Dwarf downingia has a CRPR of 2B.2 but is not listed under FESA or CESA. <br />This species is an annual herb in the bellflower family, and it blooms from March <br />to May (CNPS 2019). The current range of this species in California includes the <br />southern Outer North Coast Ranges, Inner North Coast Ranges, Sacramento <br />Valley, northern and central San Joaquin Valley, and northern San Francisco Bay <br />Area (CNPS 2019, Jepson Flora Project 2019). It typically grows in valley and <br />foothill grassland and vernal pools (CNPS 2019). The microhabitat for dwarf <br />downingia includes vernal lake and pool margins and a variety of vernal pool <br />types (CDFW 2019). Threats to this species include urbanization, development, <br />agriculture, grazing, non-native plants, vehicles, and industrial forestry. (CNPS <br />2019). This species has moderate potential to occur within the Study Area based <br />on the presence of potentially suitable habitat and vernal pools will be avoided so <br />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 dwarf downingia. <br />Mt. Diablo buckwheat (Eriogonum truncatum) <br />Mt Diablo buckwheat has a CRPR of 1B.1 but is not listed under FESA or CESA. <br />This species is an annual herb in the buckwheat family, and it blooms from April <br />to September, sometimes into December (CNPS 2019). It is endemic to <br />California, and its current range includes the Sacramento-San Joaquin Delta <br />region of the Central Valley (CNPS 2019, Jepson Flora Project 2019). It is <br />presumed extirpated from Solano County. It typically grows in chaparral, coastal <br />scrub, and valley and foothill grassland (CNPS 2019). The microhabitat for Mt. <br />Diablo buckwheat includes dry, exposed clay or sandy substrates (CDFW 2019). <br />Threats to this species include trampling, non-native plants, and urbanization <br />(CNPS 2019). Potentially suitable habitat for Mt. Diablo buckwheat is present <br />within the Study Area. However, this species has low potential to occur within the <br />Study Area because the Study Area is 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 Mt. Diablo buckwheat to: Less than Significant with <br />Mitigation Incorporated. <br />Jepson's coyote thistle (Eryngium jepsonii)