Page 290 - northlakehills_deir_0517

NorthLake Specific Plan
Draft Supplemental EIR

TABLE 5.2-3
SPECIAL STATUS PLANT SPECIES KNOWN TO OCCUR WITHIN THE
PROJECT REGION

Status Potential to Occur
on the Project site;
Species USFWS CDFW CRPR Results of Surveys
Symphyotrichum greatae –— –— 1B.3 Potential marginally suitable habitat; not
Greata’s aster observed during focused surveys.
USFWS: U.S. Fish and Wildlife Service; CDFW: California Department of Fish and Wildlife; CRPR: California Rare Plant
Rank.
LEGEND
Federal (USFWS) State (CDFW)
FE Endangered SE Endangered
FC Candidate Species
CRPR
1A Plants Presumed Extirpated in California and Either Rare or Extinct Elsewhere
1B Plants Rare, Threatened, or Endangered Throughout Their Range
2B Plants Rare, Threatened, or Endangered in California But More Common Elsewhere
3 Plants of About Which We Need More Information – A Review List
4 Plants of Limited Distribution – A Watch List
CRPR Threat Rank Extensions
.1 Seriously Endangered in California (over 80% of occurrences threatened; high degree and immediacy of threat)
.2 Fairly Endangered in California (20–80% of occurrences threatened)
.3 Not Very Threatened in California (low degree/immediacy of threat or no current threats known)
Source: BonTerra Psomas 2015.

Round-leaved filaree (Erodium macrophyllum) is a CRPR of 1B.1 species. One population of 39
round-leave filaree individuals were observed on the Project site during the 2003 botanical
surveys. Round-leave filaree was not detected during the 2014 spring botanical surveys.

Two varieties of lily—club-haired mariposa lily (Calochortus clavatus var. clavatus) and slender
mariposa lily (Calochortus clavatus var. gracilis)—occur throughout the sage scrub, native
grasslands, and annual grasslands on the Project site and were observed during focused
botanical surveys. The slender mariposa lily species is a CRPR of 1B.2 species, while the club-
haired mariposa lily has a CRPR of 4.3 species. Locations of groupings of these species were
first mapped on the Project site in 2002, then again during a 2004 pre-construction survey. Most
recently, during the botanical survey in 2014, approximately 1,709 individuals of slender/club-
haired mariposa lily hybrids were observed at 36 locations; an additional 22 populations contained
plants of varying densities, likely representing an additional 1,000 or more individuals. Therefore,
it is likely that over 3,000 individuals occur on the project site (see Exhibit 5.2-2, Special Status
Biological Resources). It should be noted that within one population, different individuals may
bloom from year to year; therefore, the number that are blooming varies from year to year.

During the previous botanical surveys four CRPR 4 species were observed on the Project site.
Peirson’s morning-glory (Calystegia peirsonii) was observed scattered throughout the Project site.
Southwestern spiny rush (Juncus acutus ssp. leopoldi) was observed along the main
Grasshopper Canyon drainage with a population estimate of hundreds of individuals. Bobtail
barley (Hordeum intercedens) was observed at one location in 1998 which is now approximately
4,350 feet outside the current Project boundary. One mature southern California black walnut
(Juglans californica var. californica), which has a CRPR of 4.2, was observed below Ridge Route
Road in the northern portion of the Project site. All of the above mentioned species were observed
during the 2014 botanical survey, except bobtail barley.

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