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-10- A large community of flora develops in the lower section of Fontenelle Creek during the summer. In areas of little gradient, this aquatic develop- ment covers the entire stream bed. Plants collected in the vicinity of the Highway 189 Bridge crossing were: Water buttercup, Batrachium trachyphyllum; marestail, Hippuris vulgaris; bur-reed, Sparganium angustifolium; water smart- weed, Polygonum amphibium; marsh paintbrush, Castilleja exilic; and the Missouri iris, Iris missouriensis. Algal growths were heavy throughout the area wherever riffles occurred. Dominant algae was the filamentous Microspora sp.~ and Ulothrix sp. Large gelantinous masses of Anabaena sp, were also present in the riffle areas. The Scenedemus dimorphic was present in small numbers. The diatom growths were quite heavy, Cocconeis, Navicula, Gomphonema and Cymbel.la were the dominant forms. One chemical check was run on Fontenelle Creek. The most interesting item resulting from this check was the amount of total dissolved solids. Concentrations of dissolved solids were more than double that of the Green River at Station No. 2 located below the mouth of Fontenelle Creek. Water Chemistr -Fontenelle Creek - 8/3/1959 I DO ppm. 8.1 Temperature °F. 74° pg 8.4 MO as ppm C03 130,0 phth as ppm CO3 5.0 Total .dissolved solids ppm. 464.0 Phosphate ppm. .13 Chloride ppm. 16.5 Calcium 4$.0 Station No. 2 - Little Colorado Bridge This station is located approximately 650 feet downstream from the Little Colorado Bridge, T23N; R11W; 518. Vegetation on the surrounding river bottom is predominately sagebrush, Artemisia sp., and greasewood, Sarcobatus vermiculatus. The smaller grasses and plants are: saltgrass, Distichilis.stricta; the three nerved goldenrod, Solidago trinervata; and whitetop, Lepidium draba. Streamside vegetation at this station is dominated by the sandbar willow, Salix exi ua. Occasional stands of the narrowleaf cottonwood, Populus an usti- folia are present. Grasses along the stream. bank were the saltgrass, Distichlis stricta, and Kentucky bluegrass, Poa pratensis, and along the water's edge, arrowgrass, Triglochin maritima; goosegrass, Potentilla anserina; and the spike rush, Eleocharis palustris, The only aquatic plant at this station was the common pondweed, Potamogeton pectinatus. This plant .was not very prevalent, however.