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l SURVEY METHODOLOGY AND RESULTS <br /> The Lone Tree gravel extraction site is within the historic range of several special- <br /> status P <br /> status plant species (Table 1). All habitats in the project area with potential to support <br /> those species listed in Table 1 were intensively surveyed on foot, by walking tight zig-zag <br /> L�^ transects. Habitat types and descriptions are listed below. All plant species observed in the . <br /> protect area were recorded and are listed in Table 2. <br /> VEGETATIVE SETTING <br /> Jones & Stokes Associates surveyed three habitats in the project area for special- <br /> status plants: ruderal; freshwater marsh, and riparian. <br /> OF Ruderal Habitat <br /> i <br /> LF Ruderal habitat in the project area consists of weedy vegetation created by continual <br /> disturbance from orchard maintenance operations (e.g., disking and herbicide application). <br /> Ruderal habitat is located in a band surrounding each almond orchard. Dominant plant <br /> d species consist of both annual forbs and grasses and include red brome Bromus <br /> wild oats Avena atua Bermuda ( rubes), <br /> { f )> grass (Cynodon dactylon}, alkali mallow (Sida leprosa), <br /> dove weed (Gremocarpus setigerus), yellow sweet clover (Melilotus indica), Russian thistle <br /> (Salsola australis), and cocklebur (Xanthium strumarium). <br /> Freshwater Marsh <br /> I <br /> Freshwater marsh habitat in the project area is dominated by monocots growing in <br /> flooded or saturated soils. This habitat is highly degraded and found in very small patches <br /> in mesic areas of agricultural ditches. Freshwater marsh habitat is dominated by broad- <br /> 'leaved cattail (Typha latifolia), umbrella sedge (Cyperus eragrostis), curly dock (Rumex <br /> crispis), and hairy willow-herb (Epilobium adenocaulum). <br /> Riparian Habitat <br /> r Riparian habitat in the project area occurs in and along Lone Tree Creek and is <br /> severely degraded by channelization of the creek, herbicide use, and litter. Riparian habitat r <br /> is characterized by the same plant species found in ruderal habitat plus a few scattered <br /> young treespecies, including willow Salix spp.), Fremont's cottonwood Po ulus emontii <br />. and tobacco tree (Nicotiana glauca). <br /> 4 <br />