Gutierrezia (go tierezia)

[NL., genus of asteroid composites, of the western United States, Mexico, and extratropical South America. They are low, glabrous, and often glutinous herbs or suffrutescent plants, with linear leaves and small heads of yellow flowers. Of the 20 species, 5 are found in the United States. IMG:content-2824.png:[blocks in formation] 2662 sometimes cylindrical, attached to the under side of the mutules and regulæ of the Doric entablature. They probably represent wooden pegs or treenails which occupied these positions in primitive wooden constructions. Also called trunnel. 2. In phar ., a drop: usually, and in prescriptions, written gt ., plural gtt .-3. In zoöl ., a small spot, generally of a round or oval form, and not differing much in shade from the ground-color, as if made by a drop of water; any small color-spot, especially when guttiform. - Gum gutte. Same as gamboge. - Gutta serena, an old medical name for amaurosis . gutta2 (gut'ä), n. [F. gutte ; gat ah , gut ah , guttah , gum, balsam.] Same as gutta perch a . gutta-perch a (gut'ä-per'cha), n. [ tah (also written guttah , gut ah , etc.), gum, balsam, + perch a (also written pertja , etc.), said to be the name of the tree producing this gum, or rather of one of the species, the Malay name of the Isonandra Gutta being tab an (also written tub an, etc.). Cf. Pulo or Pulau perch a , a former name of Sumatra, lit. the island of the perch a-tree.] The concrete juice of an evergreen sapotaceous tree, Dichopsis ( Isonandra ) Gutta , common in the jungles of the Malay peninsula and archipelago. It is a grayish or yellowish inodorous and tastele substance, nearly inelastic, at ordinary temperatures hard, tough, and somewhat horny, and flexible only in thin plates. At 120° to 140° F. it is sufficiently soft to be rolled into plates, and it becomes very soft at the temperature of boiling water. It is soluble in boiling ether, chloroform, benzol, coal-tar oils, bisulphid of carbon, and oil of turpentine, and with caoutchouc it is readily vulcanized. Gutta-perch a is used for a great variety of purposes, as for insulating electric wires, in the manufacture of hose, belting, and other flexible goods, as a substitute for leather, in mastics and cements, for splints and various surgical implements, etc. A similar product is obtained from other species of Dichopsis and of several allied genera. Also called gutta - tab an .