HORTICULTURE. 239 



The question of pollination is also a matter which should be considered 

 when the orchard is set. The curculio is the factor to be guarded 

 against, particularly as this cause may reduce the crop to a total loss. 



Types of European-plums in America (pp. 210-218). — Both the older 

 and the more modern types of European plums are considered in some 

 detail and a classification given of present day types. The following 

 groups are distinguished: Myrobalan, Damsons, Reine Claude, Dame 

 Aubert, prunes, Perdrigons, Diamond, Bradshaw, and Lombard. 

 Varieties which fall under each group are noted. 



Hybrid plains (pp. 218-230, ligs. 2).' — In this continuation of previous 

 work (E. S. R., 11, p. 47), the question of the hybrid parentage is 

 further discussed, the parentage of 18 known hybrids being given, 

 together with notes of the year on 39 hybrid varieties. 



Geography of oariation i?i. the genus Prunus in America (pp. 231- 

 239). — This is a discussion of the variation of native American species 

 of Prunus which occurs in different sections of the country, illustrated 

 b}' 2 maps which show the general trend of the distril)ution of the 

 several species series. Three points arc made the basis of discussion: 

 "(1) the striking parallelism of modification which obtains in the 

 several species series; (2) the relation of this modification to geo- 

 graphical distribution; and (3) the application of a uniform sj^stem of 

 nomenclature to the genus which shall exhibit the several groups in 

 their proper relationships and with due perspective." The Americana, 

 Chickasaw, Hortulana, Maritima, Sand Cherry, Choke Cherr}-, and 

 Black Cherry series are discussed geographically and characterized; 

 and a systematic summary given of the various series, species, and 

 varieties. The preferred botanical names are noted with principal 

 synonymy. In the preferred names, certain changes are suggested 

 Avhich "seem to help toward putting the nomenclature of the genus 

 Prunus on a more uniform basis and to show more clearly the impor- 

 tant natural relations existing between the various members of the 

 several series." A fact developed in the author's study is that the 

 Americana series of plums is continuous from New Brunswick to the 

 Mexican border. Characteristic changes occur in the different lati- 

 tudes, but "there is no break either in the geographical distribution or 

 in the gradual morphological modification of the series." 



Field notes on cherrlex (pp. 21:0-251, figs 5). — These notes are based 

 on results obtained with a number of varieties sent out by the station 

 to different parts of the State some years previous. In general only 

 sour cherries succeed in Vermont, more especially those of the Morello 

 class. Descriptive, historical, and nomenclatural notes, are given 

 on 18 varieties, followed by general, cultural, and marketing notes. 

 The varieties recommended for use on the ordinary farm, noted in the 

 decreasing order of their desirablity, are as follows: Morello, Mont- 

 morency, Brusseler Braun, Ragg, Bessarabian, Schatten Amarelle, 



