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descriptions and typical species associated with them are provided below. Table 3.3-1 <br /> provides a plant species list compiled for the entire study area. <br /> Ruderal Herbaceous Vegetation - With the exception of the riparian corridor, <br /> ruderal herbaceous vegetation dominates the study area. The reason for this is that the <br /> majority of the study area has been disturbed and has had all mature woody overstory <br /> removed. Bermudagrass, wild oat, cheeseweed, bromegrass, wild mustard and wild <br /> radish are common components of this herbaceous plant association. <br /> Oak Dominated Savannah - The oak dominated savannah is comprised of <br /> isolated, individual, mature trees (likely remnants of the original Mokelumne River <br /> riparian zone) which are dominant along the south boundary of the study area (at the <br /> base of bluffs near Clements). Valley oak, interior live oak, cottonwood, and poplar are <br /> the common components of this plant association. The understory is largely composed of <br /> ruderal herbaceous vegetation. <br /> Riparian Woodland-Dominated Overstory - Riparian vegetation is common along <br /> the Mokelumne River corridor. Willow, box elder, coyote brush, valley oak, California <br /> black walnut, cottonwood, alder, poplar, and interior live oak are dominant components <br /> of this species association, while isolated non-native fruit trees represent a minor <br /> component of the riparian zone canopy. <br /> A well established, mature, riparian woodland is the most significant plant <br /> association within the study area. While stands of native riparian woodland species are <br /> limited to a 250-foot wide corridor flanking both sides of the river, the corridor is very <br /> well established. Native stands of cottonwood, valley oak, and California black walnut <br /> dominate the tree canopy. Understory species include elderberry, mugwort, blackberry, <br /> sedge, poison oak, wild grape, and willows. <br /> Disturbed Scrub - Disturbed scrub is characterized by a sparse cover of willow, <br /> poison oak, blackberry, coyotebrush, and juvenile cottonwood and poplar. This <br /> assemblage is primarily located along the base of the bluff at the south edge of the <br /> project, near the town of Clements. This community also represents the dominant plant <br /> cover in past quarry excavation areas. <br /> 41 <br />