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<br />Soil Investigations for Data Collection in the Delta <br />Initial Study/Proposed Mitigated Negative Declaration 114 <br />the Inner North Coast Ranges, Cascade Range Foothills, northern and southern <br />Sierra Nevada Foothills, Central Valley, and Outer South Coast Ranges (CNPS <br />2019, Jepson Flora Project 2019). It is presumed extirpated from Napa and San <br />Diego counties. It typically grows in valley and foothill grassland and vernal <br />pools (CNPS 2019). The microhabitat for hogwallow starfish includes clay soils <br />and mesic sites (CDFW 2019). Threats to this species include development, <br />agriculture, and overgrazing (CNPS 2019). This species has moderate potential <br />to occur within the Study Area based on the presence of potentially suitable <br />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 hogwallow starfish to: Less <br />than Significant with Mitigation Incorporated. <br />Woolly rose-mallow (Hibiscus lasiocarpos var. occidentalis) <br />Woolly rose-mallow has a CRPR of 1B.1 but is not listed under FESA or CESA. <br />This species is a perennial rhizomatous herb in the mallow family, and it blooms <br />from June to September (CNPS 2019). It is endemic to California, and its current <br />range includes the Cascade Range Foothills, central and southern Sacramento <br />Valley, and the Sacramento-San Joaquin Delta region of the Central Valley <br />(CNPS 2019, Jepson Flora Project 2019). It typically grows in marshes and <br />swamps (CNPS 2019). The microhabitat for woolly rose-mallow includes moist, <br />freshwater-soaked river banks and low peat islands in sloughs; it can also occur <br />on riprap and levees (CDFW 2019). Threats to this species include habitat <br />disturbance, development, agriculture, recreational activities, and channelization <br />of the Sacramento River and its tributaries. It is also threatened by weed control <br />measures and erosion (CNPS 2019). This species has moderate potential to <br />occur within the Study Area based on the presence of potentially suitable habitat. <br />Implementation of Mitigation Measures MM BIO-1b, MM BIO-18, and MM BIO-19 <br />would reduce potential impacts to wooly rose-mallow to: Less than Significant <br />with Mitigation Incorporated. <br />Carquinez goldenbush (Isocoma arguta) <br />Carquinez goldenbush has a CRPR of 1B.1 but is not listed under FESA or <br />CESA. This species is a perennial shrub in the sunflower family, and it blooms <br />from August to December (CNPS 2019). It is endemic to California, and its <br />current range includes the southern Sacramento Valley (CNPS 2019, Jepson <br />Flora Project 2019). It typically grows in alkaline valley and foothill grassland <br />(CNPS 2019). The microhabitat for Carquinez goldenbush includes alkaline <br />soils, flats, and lower hills, on low benches near drainages and on tops and sides <br />of mounds in swale habitat (CDFW 2019). Threats to this species include <br />grazing, trampling, development and agriculture (CNPS 2019). Potentially <br />suitable habitat for Carquinez goldenbush is present within the Study Area.