168.- C. Phymatodes, Muhlb. - long, 6-10'. - Florida t. N. York. with N. Mex. Calif. Arizona. July 22 '67 Clark's Station on the Truckee (WWRB.) Aug. 17 - Island at the Big Bend - 20. 169.- Scirpus micropus, Parl. - N.W. Coast, lat 51°. (Sewler) Man & H. Hamp. July 7, '66 - Monitor Valley - shaded bank Aug. 26 - Carlin down Bridled Ranch Oct. 1, '66 - Snydlen Range - Granite Peak cave July 9-13, '66 Vahaluk - Provo canyon - river bank 170.- S. validus, Vahl. - From lat 57° Southward to Florida, Texas, N. Mexico & California. "Tule", growing 6-10" high and often a third in diameter at base, used by the Indians for the construction of their floating rafts. July 1, '66 - Mouth of the Placer Aug. 10, '67 - Diamond Spring Sept. 20, '67 Creek near Humboldt Pass 171.- S. maritimus, L. - N.Bayouville, Florida - [illegible] t. Calif. - Saskatchewan. Aug. 6, '67 - Humboldt Slough. "Hug Tule" Sept. - n Wrights Canyon (WWRB.) July 1, '67 - Mouth of Placer 172.- S. [illegible] ? Perhaps near S. caudiborus. Spikes 1-2, many- flowered; stem, solid - culms tinted, subcircular, 8-12' high, slender, leafy as a can; The 1-3 leaves in return flattened, much exceeding the spikes, rough above the margins; 12 scales broad-ovate, chestnut-brown, obtuse or slightly acute with the project; midvein, smooth or shining; bristles 3, half the length of the awns, planoconvex, broadly wristlike. Aug. 5, '67 - Soda Lake 2126.)