DISEASES OF PLANTS. 53 



indexed. It is particularly intended for the use of amateur gardeners, and also ior 

 those engaged professionally in horticulture, as a book of reference. 



Tlie experiment stations and the florist trade {Florists' Exchange, IS {1901), 

 No. 1~\ pP- 0O0-0O7). — Reports from 40 experiment stations throughout the country, 

 summarizing the work done at each station along the lines of floriculture. An 

 account of the work done by the Division of Pomology and the Division of Vegetable 

 Physiology and Pathology of this Department along the same lines is also included. 



Tlie question of color relative to flowers, F. S. Mathews {Florists' Exchange, 

 IS {1901), No. IS, p. 361). — Points out the differences occurring in supposedly 

 authentic color charts as regards names of different colors. 



Ether treatment of plants {Gartenflora, 50 {1901) , No. 4, p. 99). — A brief account 

 is here given of the successful use of ether vapor in forcing a number of greenhouse 

 plants. It Avas especially valuable with Viburnum tomcntosurn plicatum, Azaleamollis, 

 and A. pontica, but was without benefit with Deutzin gracilis. 



Hybridization in Amarylleae {Gard. Chron., 3. ser., 29 {1901), Nos. 734, pp- 37, 

 3S; 735, p. 53; 736, jyp. 71, 72; 737, pp. 89, 90; 738, pp. Ill, 112) .—The author deals 

 with hybrids that have been raised in gardens between individuals of this suborder 

 from warm, temperate, and tropical regions. Forty-seven genera are dealt with 

 specifically. 



Notes on cannas, F. K. Luke {Jour. Columhus ITorf. Soc, 15 {1900), No. 4, pj). 

 150-159, ph. 3). — Cannas are divided into 4 subgenera and a mimber of the more 

 prominent varieties described. 



Carnations, preparation for field planting, A. ]M. Hekr {Amer. Florist, 16 

 {1901), No. 668, pp. 1159, 1160). — Directions for fertilizing and cultivation. 



New chrysanthemums of 1900, H. Dauthenay {Rev. Hart., 73 {1901), No. 5, 

 pp. 121-123) . — This paper purposes to give a complete list of the different varieties 

 of chrysanthemums introduced in 190O. Each variety is descriptively characterized. 



Shasta daisies {Pacific Rural Press, 61 {1901), No. 8, p. 113, figs. ^).— This new 

 creation by Luther Burbank is illustrated and described. It is said to be the result 

 of crossing and selection between the weedy, free-flowering American species, the 

 rather large but coaise European sj^ecies, and the Japanese species. The flowers are 

 very large, averaging from 3 to 4 in. in diameter, and are produced on stiff stems 

 nearly 2 ft. in length. The petals are glistening white and arranged in three rows. 

 The plant flowers freely and is hardy wherever oak is hardy. Some Shasta daisies 

 with well-marked colors are now appearing. 



Hydrangea hortensia, Jeanne d'Arc {Anicr. Gard., 22 {1901), No. 327, p. 

 225). — A new pure white creation said to be a sjiort from the variety Thomas Hogg 

 and especially suitable for pot culture. 



DISEASES OF PLANTS. 



Plant diseases in 1900, A. L. Quaintaxce {Georgia ,Sta. Rpt. 1900, pp. 351-361, 

 jtls. 3). — Notes are given on a number of the more injurious plant diseases noted by 

 the author during the season covered by the report. One of the most destructive 

 diseases is the brown rot of peaches and plums {Monilia fractigena). Experiments 

 have been reported (E. S. R., 12, p. 962) for the control of this disease on the peach, 

 and in the present report the results of spraying plums of the Americana tyi)e are 

 given. From the data at hand it appears that the spraying with Bordeaux mixture 

 was practically wdthout value upon plums of this race. As an explanation of the 

 inefficiency of the fungicide the author suggests that possibly the fruit is infected by 

 the fungus which may have been perennial in the fruiting spurs. A bacterial rot of 

 onions, similar to that which has been described as occurring in New York (E. S. R., 

 12, p. 56), is reported, and in some cases has proved very destructive. 



Notes are given on a number of diseases of peach, cherry, pear, grape, and apple. 

 A cantaloupe blight, similar to that described in Colorado (E. S. R., 12, p. 261), is 



