FOEESTRT. 441 



being tested by the station: Native wild cotton (Igenhauzia trilota), lAppia 

 wrightii, huisache (TachelUa farnesiana), sotol (Dasylirion whecleri), bear 

 grass or hickory grass (Nolina microcarpa) , D. graminif alius, native leadwort 

 (Plumhago scandens), canyon goldenrod {Solidago sparsiflora subcinerea), na- 

 tive spiderwort (Tradcscantia scopulorum), Spanish broom (Cytisus scorparius), 

 and Russian oleaster (Elwagnus hortensis songorica) , 



New g'arden j>lants of the year 1912 (Roy. Bot. Gard. Eew, Bui. Misc. In- 

 form., 1913, App. 3, pp. 50-78). — This comprises a descriptive list of all the new 

 plant introductions recorded during 1912 In various botanical and horticultural 

 publications, both English and foreign. 



Dahlias, G. Gordon (London and Edinburgh [1913], pp. XI +115, pis. 8). — A 

 popular treatise on dahlia culture in which the various desirable forms are 

 described and suggestions are given relative to selections for various color 

 effects, as well as the production of an abundant supply of cut flowers and 

 exhibition blooms. 



Success in gardening, Jessie P. Frothingham (New York, 1913, pp. XIII -\- 

 333, pis. 16). — A popular treatise on ornamental gardening. The subject mat- 

 ter, which is arranged with reference to the work for each week in the year, is 

 largely txised on a garden day-book formerly kept by the author's father. 



FORESTRY. 



American forest trees, H. H. Gisson, edited by H. Maxwell (Chicago, 1913, 

 pp. 70S+XV, pi. 1, figs. 227). — This work comprises popular descriptions of the 

 leading timber species of the United States and of a large number of less im- 

 portant trees. The subject matter has previously appeared for the most part 

 In a series of articles in the Hardwood Record of Chicago. 



The various trees are considered with reference to their distinguishing char- 

 acteristics, prominent physical properties, and the adaptability of their wood 

 for various uses. The descriptions are accompanied by photographs and draw- 

 ings of trunk and foliage. 



Th.e forests of Prince George's County, F. W. Besley (Baltimore, Md.: 

 State Bd. Forestry, 1913, pp. 40, pis. 4). — This report is based on a forest sur- 

 vey made in 1907 under the direction of the Mai^jland State Board of Forestry. 



The subject matter is discussed under the following general headings : To- 

 pography and soil, the distribution of the forests, forest types, the stnnd of tim- 

 ber and its value, value of the present stand of timber, native tree species, the 

 important commercial trees, the products of the forests, transportation facili- 

 ties, destructive influences, and forest management. A forest map of the area 

 is appended. 



The trees and shrubs of Oklahoma, C. W. Shannon (OJcla. Oeol. Survey 

 Circ. 4, 1913, pp. Jtl, fig. 1). — A preliminary list of the trees and shrubs of Okla- 

 homa, including the family, genus, and scientific and common names, together 

 with notes on the general and. specific occurrence of each plant. 



Experiments on individual selection with forest trees. — I, Pinus sylvestris, 

 E. Zederbauer (Centbl. Gcsam. Forstw., 38 (1912), No. 5, pp. 201-212, pi. 1, 

 figs. 3). — This comprises the results of an experimental study of the progeny 

 of various individual Scotch pine trees growing in the same stand or locality. 

 The study was continued for several years in a number of localities. The data 

 are here presented in tabular form and fully discussed. 



The author concludes that the variability of the individuals in a stand is not 

 only dependent upon the locality but also upon inherited characteristics. In a 

 Scotch pine stand may be seen broad open-crowned individuals with few but 

 strong, quick growing branches and also small dense-crowned individuals with 



