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<br />Soil Investigations for Data Collection in the Delta <br />Initial Study/Proposed Mitigated Negative Declaration 111 <br />Implementation of Mitigation Measures MM BIO-1b, MM BIO-12, MM BIO-18, <br />and MM BIO-19 would reduce potential impacts to spiny-sepaled button-celery <br />to: Less than Significant with Mitigation Incorporated. <br />Diamond-petaled California poppy (Eschscholzia rhombipetala) <br />Diamond-petaled California poppy has a CRPR of 1B.1 but is not listed under <br />FESA or CESA. This species is an annual herb in the poppy family, and it <br />blooms from March to April (CNPS 2019). It is endemic to California, and its <br />current range includes the western San Joaquin Valley and eastern San <br />Francisco Bay Area (CNPS 2019, Jepson Flora Project 2019). It is presumed <br />extirpated from Contra Costa, Colusa, and Stanislaus counties. It typically grows <br />in valley and foothill grassland (CNPS 2019). The microhabitat for diamond- <br />petaled California poppy includes alkaline clay slopes and flats (CDFW 2019). <br />Threats to this species include agriculture and grazing (CNPS 2019). This <br />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 diamond-petaled California poppy to: Less than <br />Significant with Mitigation Incorporated. <br />San Joaquin spearscale (Extriplex joaquinana) <br />San Joaquin spearscale has a CRPR of 1B.2 but is not listed under FESA or <br />CESA. This species is an annual herb in the goosefoot family, and it blooms <br />from April to October (CNPS 2019). It is endemic to California, and its current <br />range includes the Inner North Coast Ranges, Central Valley, San Francisco Bay <br />Area, and Inner South Coast Ranges (CNPS 2019, Jepson Flora Project 2019). <br />It is presumed extirpated from Santa Clara, San Joaquin, and Tulare counties. It <br />typically grows in chenopod scrub, meadows and seeps, playas, and valley and <br />foothill grassland (CNPS 2019). The microhabitat for San Joaquin spearscale <br />includes seasonal alkali wetlands or alkali sink scrub (CDFW 2019). Threats to <br />this species include grazing, agriculture, development, and non-native plants <br />(CNPS 2019). This species has moderate potential to occur within the Study <br />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 San Joaquin spearscale to: <br />Less than Significant with Mitigation Incorporated. <br />Stinkbells (Fritillaria agrestis) <br />Stinkbells has a CRPR of 4.2 but is not listed under FESA or CESA. This <br />species is a perennial bulbiferous herb in the lily family, and it blooms from March <br />to June (CNPS 2019). It is endemic to California, and its current range includes <br />the Inner North Coast Ranges, Sierra Nevada Foothills, Central Valley, and <br />Central Western California (CNPS 2019, Jepson Flora Project 2019). It is