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<br />Soil Investigations for Data Collection in the Delta <br />Initial Study/Proposed Mitigated Negative Declaration 103 <br />Mt. Diablo fairy-lantern (Calochortus pulchellus) <br />Mt. Diablo fairy-lantern has a CRPR of 1B.2, but it is not listed under FESA or <br />CESA. This species is a perennial herb in the lily family, and it blooms from April <br />through June (CNPS 2019). This species is endemic to California, and its current <br />known range includes the San Francisco Bay Area (CNPS 2019; Jepson Flora <br />Project 2019). It typically grows in chaparral, cismontane woodland, riparian <br />woodland and valley and foothill grassland (CNPS 2019, CDFW 2019). Threats <br />to this species include grazing, urbanization, horticultural collection, and feral <br />pigs (CNPS 2019, CDFW 2019). Suitable habitat for Mt. Diablo fairy lantern 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 so potential impacts would be less than significant. <br />Implementation of Mitigation Measures MM BIO-18 and MM BIO-19 would further <br />avoid, minimize and/or reduce the potential for impacts to Mt. Diablo fairy lantern. <br />Bristly sedge (Carex comosa) <br />Bristly sedge has a CRPR of 2B.1, but it is not listed under FESA or CESA. This <br />species is a perennial rhizomatous herb in the sedge family, and it blooms from <br />May through September (CNPS 2019). The current range of this species in <br />California includes the Klamath Ranges, interior North Coast Ranges, High <br />Cascade Range, Central Valley, northern Central Coast, San Francisco Bay <br />Area, and Modoc Plateau (CNPS 2019; Jepson Flora Project 2019). It is <br />presumed extirpated from San Bernardino and San Francisco counties. It <br />typically grows in coastal prairie, marshes and swamps, and valley and foothill <br />grasslands (CNPS 2019). The microhabitat for bristly sedge includes lake <br />margins and other wet places (CDFW 2019). Threats to bristly sedge include <br />marsh drainage and road maintenance (CNPS 2019). This species has moderate <br />potential to occur within the Study Area based on the presence of potentially <br />suitable habitat. <br />Implementation of Mitigation Measures MM BIO-1b, MM BIO-18, and MM BIO-19 <br />would reduce potential impacts to bristly sedge to: Less than Significant with <br />Mitigation Incorporated. <br />Lemmon's jewelflower (Caulanthus lemmonii) <br />Lemmon’s jewelflower has a CRPR of 1B.2, but it is not listed under FESA or <br />CESA. This species is an annual herb in the mustard family, and it blooms from <br />March through May (CNPS 2019). It is endemic to California, and its current <br />range includes the southwestern San Joaquin Valley, southeastern San <br />Francisco Bay Area, and South Coast Ranges (CNPS 2019; Jepson Flora <br />Project 2019). It typically grows in pinyon and juniper woodland and valley and <br />foothill grassland (CNPS 2019). Threats to this species include development, <br />grazing, and vehicles (CNPS 2019). This species has moderate potential to <br />occur within the Study Area based on the presence of potentially suitable habitat.