Floristik etc. — Angewandte Botanik. 207 



'& 



the Colorado Plateau in northern Arizona are given. The prin- 

 cipal species are described in the Upper Sonoran, the Transition, 

 the Canadian and the Hudsonian zones with a check list of some 

 of the species with their common names arranged systematically. 



Harshberger. 



Rock, J, F., The Indigenous Trees of the Hawaiian 

 Island. (518 pp. with 215 Photo Engravings. Honolulu. 1913.) 



The bulk of this finely illustrated volume p. 89-512 comprises 

 a scientific and systematic description of the forest trees beginning 

 with the tree ferns and concluding with the trees of the family 

 Compositae. The first part of the book deals with the botanical 

 regions. In this part, the author describes the Strand Vegetation, the 

 lowland region (dry andwet), the lower forest region (windward and 

 leeward sides), the middle forest region (dry, semi-dry, wet, Kipukas), 

 the bog region, the Upper forest region. Under each of these cap- 

 tions, the Vegetation, as a whole, is considered with especialreference 

 to the trees of the different districts. Other details of phytogeographic 

 interest. as the elevation at which ceriain trees grow and the kind 

 of soil on which they grow are described. Harshberger. 



Rothrock, J. T., Areas of Desolation in Pennsylvania. 



(30 pp. Philadelphia 1915.) 



This brochure is a description of the waste places of the State 

 derived from previoush^ forested areas by the axe of the lumberman, 

 fire, erosion and careless treatment. The methods of reforestation 

 are considered, a historic sketch of forestry in the State is briefly 

 given, and a plea for forest care is made in order to stimulate an 

 interest in the important work, which has been undertaken by the 

 State. Harshberger. 



Skottsberg, C, Notes on the Relations between the Floras 

 of Subantarctic America and New Zealand. (The Plant 

 World. XVIII. p. 129-142. May 1915.) 



This paper is in part the outcome of travels by the author in 

 Antarctica and is based on the evidence of fossil floras, as well, as 

 on the living flowering plants. The different genera are given under 

 each family and in parentheses the number of species of eachgenus 

 actually known. With the evidence at band, the author concludes 

 that there existed an Antarctic Tertiary flora bearing resemblances 

 to the present floras of Subantarctic America, New Zealand 

 and Australia, and that the Antarctic continent ma}^ have been 

 a center of evolution from which animals and plants wandered north. 



Harshberger. 



Herter, W., Der mikroskopische Nachweis der Kartoffel 

 im Roggenbrot. (Mit Tafel). (Zschr. ges. Getreidew. VI. p. 

 205-210. 5 Fig. 1914.) 



Die Erkennung des Kartoffelzusatzes im Brot bereitete bisher 

 gewisse Schwierigkeiten. Verf. beschreibt ein Verfahren, welches 

 gestattet, auf mikroskopischem Wege die verschiedenen Kartoffel- 

 produkte im Brot nachzuweisen. Als solche kommen in Frage: 

 1. rohe Kartoffeln, Kartoffelstärke, Kartoffelstärkemehl, 2, gekochte 



