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• 3.2 SUMMARY OF QUANTITATIVE DATA <br />Guantitaiive data on cover, herbaceous production and woody plant density collected in the study <br />area and the Seneca It Mine reference areas are summarized in Table 23. <br />3.3 54MPLE ADEQUACY <br />Statistical adequacy of the quantitative cover, production, end woody plant density samples taken <br />in the study area baseline studies are set forth in Table 29. As can be seen, there were several <br />cases where the prescribed maximum number of samples were insufficient to cause <br />demonstration of adequate sample size. <br />3.4 PLANT SPECIES LIST <br />All plant species observed during the field studies conducted in July end early August 1987 ere <br />listed in Table 25. Listed for each species is lifeform, provenance (native or introduced), and <br />• the vegeiaiion type in which they occur. A total of 167 species are included in Table 25 with <br />the lifeform species breakdown as follows: 12 annual end biennial forbs, l annual greminoid, 91 <br />perennial forbs, 35 perennial greminoids, 23 shrubs, Z trees, and 3 mosses and lichens (nose: <br />no attempt to thoroughly inventory cryptogamic species was made). Of the 167 plants observed, <br />all but 12 were native. The only plant present that is classified ire Colorado es a "prohibited <br />noxious" weed is Canada thistle (Cirsium ervense). Curly dock (Rumex, crisous), pennycress <br />(Thlespi arvense), and buckhorn plantain (Planieoo lanceolate) are species present that are <br />classified as "resiricfed noxious" weeds in Color~o. <br />3.5 PLANT SPECIE50F SPECIAL CONCERN <br />None of the plant species observed in the study area are included on lists of designated or <br />candidate threatened or endangered species maintained by the U.S. Fish end Wildlife Service <br />(1983) nor were any of the observed species present on the list of State Species of Special <br />Concern maintained by the Colorado Natural Heritage Inventory (Colorado Dept. of Natural <br />Resources, CNHI 1986). <br />-24- <br />