328 EXPERIMENT STATION RECORD. 



and mentions the deciduous trees occuring in that region. The location and extent 

 of burned areas and the reason for the preservation of the forests are given and a 

 system for timber protection is outlined. 



A descriptive catalogue of useful fiber plants of the world, C. R. Dodge 

 ( V. S. Dep1. Agr., Fiber Investigations Rpt. Xo. 9, pp. 361, i)ls. 13, figs. 103).— This 

 publication is an enumeration of 1,018 species of useful tiher plants, the more 

 important of which are fully descrihed from a botanical, agricultural, and indus- 

 trial standpoint. The scientific, commercial, and common names of the plants and 

 also the native names, when they could be obtained and verified, are given, and the 

 kind of fiber produced, the part of the plant producing it, and the botanical rela- 

 tionship of the species are indicated. In addition to the catalogue proper, the work 

 treats of the definition of fibers, their ancient uses, their commercial uses in the 

 United States, their imports, and their study from an economical, chemical, and 

 micro-chemical standpoint. Two classifications, one based on the structure of the 

 filters and the other on their uses, are outlined. An article on the identification of 

 fihers, a description and history of laces, and brief statements regarding filter 

 machinery and its uses are appended. 



Little-known grasses, F. Lamson-Scribnkr (U. S. Dept. Agr., Division of Agros- 

 tology Bid. 8, pp. 5-11, pis. 7, fig. 1). — The author gives descriptive notes and illustra- 

 tions of the following species: Poa turneri, P. leibergii, Panicum leibergii, Elymus 

 brownii, E. flavescens, E. dasystuchys littoralis, Eragrostis obtusiflora, Sporobolus plum- 

 beus, and Muldenbergia flaviseta. 



The water hyacinth and its relation to navigation in Florida, H. J. Webber 

 ( U. S. Dept. Agr., Division of Botany Bui. 18, pp. 7-20, pi. 1, figs. 4). — The bulletin dis- 

 cusses the structure, growth, and propagation of the water hyacinth ; its introduction, 

 dissemination, and present distribution in Florida; the damage it causes to bridges, 

 navigation, the timber and fishing industries; the possibilities of its extermination, 

 and the methods of keeping it in check. It has become a serious pest only in sluggish 

 fresh-water streams. The author believes that the entire eradication of it is not 

 feasible. Among other means of keeping it in check the agency of diseases is sug- 

 gested. 



Contribution to the knowledge of the Rubi corylifolii, K. Friderichsen {Hot. 

 Centbl., 70 (1897), Xo. 11-12, pp. 340-350). — Notes are given on the affinities, etc., of 

 the species of Rubus in the Corylifolii group. 



General description of the Cactaceae, K. Schumann (Reviewed in Naturiv. Rund- 

 schau, 12 (1897), Xo. 3?, p. 410). 



On the role of histology in the classification of fungus spores, P. A. Dangk,ard 

 (Botaniste, 5. ser., 1897, Xo. 6, pp. 314-317). 



Concerning the history of the question of sexuality in plants, F. Kamienski 

 (Le Monde des Plantes, 19 (1897), Xo. 91, pp. 121-125). 



On the sexual production of the Ascomycetes, P. A. Dangeard (Botaniste, 5. 

 ser., 1897, Xo. 6, pp. 245-284, figs. 17). — A second memoir. 



Investigations on the origin and development of the sex organs of Triticum 

 with special reference to nuclear division, M. Kornicke (Verhandl. natnr. hist. 

 Yer. Preuss. Rheinlande, 53 (1896), pp. 149-1S5, pi. figs. 3). 



Recent investigation on cross-fertilization and self-sterilit}', W. O. Focke 

 (Abhandl. Xaturw. Ver. Bremen, 14 (1897), Xo. 2, }>p. 297-304; abs. in Bot. Centbl., 71 

 (1897), Xo. 7, p. 235). 



Development of the pollen grains of Allium fistulosum, C. Ishikawa (Jour. 

 Col. Sei. Imp. Univ. Tokyo, vol. 10, Pt. II, pp. 31, figs. 2; abs. in Bot. Centbl., 71 (1897), 

 Xo. 6, pp. 211, 212). — This is a contribution to the study of chromosome reduction. 



The leaf structure of Jouvea and Eragrostis obtusiflora, Miss E. L. Ogden 

 ( U. S. Dept. Agr., Division of Agrostology Bui. 8, pp. 12-20, pis. 2). — Anatomical studies 

 are given of the leaf structure of Jouvea pilosa and ./. straminea and comparisons 

 made with the structure of the leaves of Eragrostis obtusiflora and Distichlis spicata. 



I 



