334 Floristik u. Systematik der Phanerogamen. — Agricultur etc. 



Rogers, W. M. and E F. Linton, French and Germ an 



views of British Rubi. (Journal of Botany, London. 



Vol. XLIII. No. 511. 1905. p. 198—205.) 



Thls is a criticism of Ihe changes in nomenclature or Classification, 

 suggested in Focke's monograph of Central European Rubi in 

 Ascherson and Graebner's „Synopsis". Sucli changes are dis- 

 cussed in a considerable number of species and are in inost cases 

 rejected or their value questioned by the authors. F. E. Fritsch. 



Thiselton-Dyer, Sir W. T., Curtis's Botanical Magazine. 

 4''^ series. Vol. 1. Nos. 5—7. May-July, London 1905. 



Tab. 8012: — Prunus Pseudocerasns Lindl. — Japan and China; 

 tab. 8013: — Rliipsalis clissimilis K. Schum. var. setulosa Weber — 

 B razil; tab. 8014: — Listrostachys bidens Roffe — West Tropica 1 

 Africa; tab. 8015: — Colchicum libanoticum Ehrenb. — Syria; tab. 

 8016: ^ Hippophae rhamnoides L. — Temperate Europe and Asia. 



Tab. 8017: — Nepenthes Rajah Hook. f. — Borneo; tab. 8018: 

 — Erica hisitanica Rudolph — Western Europe; tab. 8019 : — Rliabdo- 

 tliamnns Solandri A. Cunn. — New Zealand; tab. 8020: — Lycaste 

 LocustalR*i\c\\b. f. — Peru; tab. 8021: — Bowkeria gerrardiana Harv. 

 ex Hiern — Natal. 



Tab. 8022: — Cacalia tuberosa Nutt. — North America; tab. 

 8023: — Pernettya mucronata Gaud. (varietates diversae) — South 

 Chili and P a t a g o n i a ; tab. 8024 : — Coleiis shirensis Gurke — British 

 Central Africa; tab. 8025: — Colchicum Steveni Kunth. — Syria and 

 Arabia; tab. 8026: — Listrostachys Monteirae Reichb. f. — West 

 Tropical Africa. F. E. Fritsch. 



Ward, H. Marshall, Trees, a handbook of Forest- 



Botany for the woodlands and the laboratory. 



Vol. IL Leaves. (Cambridge: at the University Press, 



1904. p. I— X, 1—348. Figs. 124 and one hill-page illii- 



stration brown. 8". Price: 4s. 6d. Net.) 



This second volume of the series on trees is devoted to a careful 

 consideration of the leaf from all points of view. The book is divided 

 into a general and a special part, the fourteen chapters of the former 

 being devoted to a discussion of the external morphology of the leaf 

 (Chs. I — V^ incl. characters of venation), of the structure of the leaf 

 (Chs. VI— X) and the physiology of the leaf (Chs. XI— XIII), whilst the 

 last treats of non typical leaves and their subsidiary functions. In the 

 special part trees and shrubs are classified according to the characters 

 of the leaves; they are arranged in a dichotomous manner and a detailed 

 description of the leaf of each species is given, w^hilst numerous figures 

 help to illustrate the special points. The book contains a great deal of 

 useful Information and the general part is written in an easily comprehen- 

 sible style. F. E. Fritsch. 



BOULGER, G. S., Rubber. Part 1. (Proceedings of Association 

 of Economic Biologists. Vol. I. July 1905. p. 6.) 



Rubbers are mainly produced between the isotherms of 70" F, where 

 the rainfall is not less than 90 inches. 



True caoutchoucs are produced by plants belonging to the orders 

 Euphorbiaceae, Morciceae, Apocynaceae, and Asclepiadaceae, and gutta 

 perchas from Sapotaceae. 



The chemistry of rubbers, and the species, Synonyms and country 

 of origin of plants yielding guttapercha are dealt with. The paper is 

 given in abstract only. W. G. Freeman. 



