480 SUMMARY OF CURRENT RESEARCHES RELATING TO 



var. Neesiana and var. sphagnicola. He admits that K. Miiller and 

 Massalongo offer strong reasons for raising the var. Neesimia to specific 

 rank, and himself inclines to regard it as a xerophilous form which is 

 tending to differentiate itself more and more. He would regard it 

 rather as a sub-species than as a variety. He discusses its points of 

 difference from G trichomanis, its variability, its habitat, its synonymy. 

 With regard to G. trichomanis var. sphagnicola, he gives the results of 

 his observations of the varying forms of Calypogeia in two neighbouring 

 bogs in the Jura range, and states that the vegetative structure of var. 

 sphagnicola differs only in size from that of sphagnicolous forms of 

 G. trichomanis. He gives a series of figures of the different forms of 

 the amphigastria found in var. sphagnicola. 



Distribution of Timmia megapolitana.* — V. Torka writes of the 

 occurrence of Timmia megapolitana Hedw. in the province of Posen. 

 He found it near Nakel, and mistook it at first for Gatharinea undulata 

 (which it very closely resembles) until he found a single old capsule. 

 It was associated with Betula hiimilis, Bryv/m bimum, B. intermedium, 

 Philonotis marchica, Riccia glauca, and Marchantia polymorpha. The 

 species was first found about 120 years ago at Malchin, in Mecklenburg, 

 and subsequently in West Prussia, on the island of Riigen, and at 

 Lauenburg. The author has kept the Posen plant under observation, 

 and describes the growth of the sporogonium, though most of the 

 young capsules were killed by the winter. He is led to believe that 

 the species will yet be found in the Mark Brandenburg. 



Monograph of the World's Mosses Completed.f— V. F. Brotherus 

 publishes the concluding fascicles of his monograph of the Musci in 

 Engler's Pflanzenfamilien. After finishing the remaining seven genera 

 of Brachytheciaceae, he treats of the Hypnodendracere (four genera), 

 and gives a supplement of G6 pages comprising numerous additions that 

 have arisen since the printing of the text. This is followed by an 

 index of the genera recognised in the work. On page 1172 the author 

 explains in a note his reasons for giving so elaborate an account of the 

 mosses of the world. Since the Synopsis Muscorum of Carl Miiller was 

 published more than half a century ago, no monograph of the mosses 

 has appeared ; but meanwhile, in numerous papers, multitudes of new 

 species have been described, and these badly needed to be grouped into 

 genera based on a definite system. He adds a few words on the system 

 of classification adopted by Fleischer in his still unfinished Moss-flora 

 of Java. 



Moss Exchange Club.J— The Moss Exchange Club has published 

 its Fourteenth Annual Report, containing lists of mosses and hepatics 

 gathered by the Fellows. In several cases critical notes are appended. 

 Anglicised descriptions of Riccia Grozalsii Levier, Aplozia caespiticia 

 Dum., and two varieties of A. riparia. 



By the same Club § is issued an Exchange List of European Mosses, 



* Hedwigia, xlviii. (1908) pp. 142-4. 



t Leipzig : Engelrnann, 1909, lief 234-5, pp. 1153-124G, title pages, etc. (figs.) 



X York : Coultas and Volaus, 1909, pp. 295-327. 



§ Y'cnk : W. Ingham (1909) 4 pp. 



