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(Salix exioua) which occur primarily adjacent to the west lateral CC Ditch. 2) Less well-drained <br />areas, or areas where standing or slow-flowing water occurs during much of the growing <br />season, support vegetation that is dominated by phreatophytic and hydrophytic graminoids <br />(carices, rushes, and sedges). 3) The least well-drained areas, or areas where standing water <br />persists, are dominated exclusively by thick stands of cattail (Typha latifolia also a perennial <br />graminoid). <br />The graminoid-dominated component characterizes the Swale/drainage type because of its <br />greater areal extent (approximately 95 percent of the type) than the other two components and <br />its potential grazing utility. Cattail occurs primarily adjacent to stock ponds and in tailwater <br />drainage ditches. Willow is primarily restricted to the banks of the west lateral CC Ditch. <br />Where significant areas of cattails and willows occur, they form islands or stringers within the <br />graminoid component. <br />Vegetation cover, frequency and herbaceous production samples were concentrated in the <br />graminoid component of the swale/drainage type primarily because of measurability and the <br />fact that this component comprises the majority of the type. The willow component has a <br />closed canopy and measurement of the production of shrubs is not required by CDMG <br />• regulations. However, density data in the willow thickets was collected. No data was collected <br />from the cattail component. Both the willow and cattail components function primarily as <br />wildlife habitat (see Section 2.04.11, Fish and Wildlife Resources Information). The cover and <br />frequency sampling results for the graminoid component are summarized in Table 2.04.10-19. <br />Total vegetation cover was estimated at 59.0 percent (Table 2.04.10-19). The cover of litter <br />and bare ground was 40.8 and 0.2 percent, respectively. Hydrophytic graminoids comprised <br />most of the vegetal cover (41.9 percent total cover) followed by perennial (orbs (3.5 percent <br />total cover), annual fortis (0.2 percent total cover). <br />The mean herbaceous production in the graminoid component of the Swale/drainage type is <br />presented in Table 2.04.10-20. Table 2.04.10-20 expresses production on a dry weight basis <br />by morphological class as grams per 0.25m2 (plot size), pounds per acre and percent <br />composition by weight. The results indicate that perennial graminoids dominated the type <br />component in terms of biomass (90.6 percent of the total above-ground plant biomass). <br />(REVISED 9/99) 2.04.10 - 66 <br />• <br />