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<br />Soil Investigations for Data Collection in the Delta <br />Initial Study/Proposed Mitigated Negative Declaration 112 <br />presumed extirpated from Santa Cruz and San Mateo counties. It typically grows <br />in chaparral, cismontane woodland, pinyon and juniper woodland, and valley and <br />foothill grassland (CNPS 2019). The microhabitat for stinkbells includes non- <br />native grasslands or grassy openings in clay soil, sometimes on serpentine <br />(CDFW 2019). Threats to this species include development, grazing, vehicles, <br />and non-native plants (CNPS 2019). Potentially suitable habitat for stinkbells is <br />present within the Study Area. However, this species has low potential to occur <br />within the Study Area because the Study Area is located on the edge of its <br />known range and contains no serpentine soils. <br />Implementation of Mitigation Measures MM BIO-18 and MM BIO-19 would <br />reduce potential impacts to stinkbells to: Less than Significant with Mitigation <br />Incorporated. <br />Fragrant fritillary (Fritillaria liliacea) <br />Fragrant fritillary has a CRPR of 1B.2 but is not listed under FESA or CESA. <br />This species is a perennial bulbiferous herb in the lily family, and it blooms from <br />February to April (CNPS 2019). It is endemic to California, and its current range <br />includes the Sacramento Valley and Central Western California (CNPS 2019, <br />Jepson Flora Project 2019). It typically grows in cismontane woodland, coastal <br />prairie, coastal scrub, and valley and foothill grassland (CNPS 2019). The <br />microhabitat for fragrant fritillary includes grassland on various soils though <br />usually on clay, and often on serpentine (CDFW 2019). Threats to this species <br />include grazing, agriculture, urbanization, and non-native plants (CNPS 2019). <br />This species has moderate potential to occur within the Study Area based on the <br />presence of potentially suitable habitat. <br />Implementation of Mitigation Measures MM BIO-18 and MM BIO-19 would <br />reduce potential impacts to fragrant fritillary to: Less than Significant with <br />Mitigation Incorporated. <br />Boggs Lake hedge-hyssop (Gratiola heterosepala) <br />Boggs Lake hedge-hyssop is listed as Endangered under CESA and has a <br />CRPR of 1B.2 but is not listed under FESA. This species is an annual herb in <br />the plantain family, and it blooms from April to August (CNPS 2019). The current <br />range of this species in California includes the Inner North Coast Ranges, <br />Cascade Ranges, northern and central Sierra Nevada Foothills, Central Valley, <br />and the Modoc Plateau (CNPS 2019, Jepson Flora Project 2019). It typically <br />grows in lake margins, marshes and swamps, and vernal pools (CNPS 2019). <br />The microhabitat for Boggs Lake hedge-hyssop includes clay soils in vernal <br />pools or lake margins (CDFW 2019). Threats to this species include agriculture, <br />development, grazing, trampling, and vehicles (CNPS 2019). This species has <br />moderate potential to occur within the Study Area based on the presence of <br />potentially suitable habitat.