166 SUMMARY OF CURRENT RESEARCHES RELATING TO 



B. Blindii, but it is distingnished by the occurrence of brood-bodies, a 

 quite different form of fruit, very concave leaves with looser areolation, 

 etc. The Latin name refers to the worm-like brood-bodies. E. S. G. 



Revision of the North American Species of Encalypta, — Dorothy 

 COKER (Bull. Torrey Bot. Clul), 1918, 45, 433-49, 2 pis.). iVn account 

 of the genus Encalypta, with descriptions of the species, and figures of 

 their essential characters. As a result of careful comparison of original 

 and authentic specimens it has been found possible to reduce to eight 

 the eighteen species that have been recorded for North America ; and a 

 key for their ready determination is provided. A. G. 



Two Cleistocarpic Mosses of the Bolivian High Cordilleras. — T. 

 Herzoci {Flora, N. F., 1914, 1, 317-26, 5 figs. ; see also ^o^. Gentralbl.^ 

 1915, 128, 499). The author begins by criticizing cleistocarpy as a 

 character in systematic grouping, and describing the views of various 

 authors on the subject. He shows the unreliability of the character, and 

 quotes as instances the intermediate position of Mildeella bryoides, the 

 cleistocarpous forms of Ditrichum ; and also such forms as Physcomitrella 

 Hanrpei, which are sometimes regarded as bastards, sometimes as arrested 

 forms, but which in both cases merely obliterate the boundaries between 

 cleistocarpous and stegocarpous mosses. Having proved the worthless- 

 ness of cleistocarpy as a systematic character for families, the author 

 goes on to prove it equally worthless in dividing genera. He finds 

 among the Cordillera mosses two ca^es in which plants agree in all the 

 important generic characters, but differ in having cleistocarpous and 

 stsgocarpous sporogonia. The one case is the cleistocarpous Tristichium 

 Lorentzii C. Miiller and Tristichiopsis mirahilis of the same author. A 

 complete series of forms was found, connecting these two species, and 

 the author gives his reasons for retaining the two as species but in one 

 genus. He regards the cleistocarpous form as a species either in the 

 making or already fixed. The second case is Conostomum aequinoctiale 

 and G. cleistocarpum, the latter being the only wholly cleistocarpous 

 Bartramiaceous moss hitherto known. The close relationship of these 

 two species is shown ; and the author concludes with the words : " In 

 any case we have here two cleistocarpous species whose origin from 

 stegocarpous species can no longer be doubted." E. S. G. 



Moss Distribution in Sweden. — H. Moller (ArJciv for Bofanik, 

 1917, 15, No. 2, 108 pp.). This is the fourth section of the author's 

 study of the Swedish moss-flora, and it treats of the Leskeacete and 

 Pterogoniaceae, species by species, at considerable length. A new variety 

 of Anomodon longifolius is described. A. G. 



Mosses of the " Vega " Expedition. — H. W. Arnell {ArTciv for 

 Botanik, 1917, 15, No. 5, 111 pp.). An account of the bryophytes of 

 the "Vega" Expedition of 1878-80, collected byF. R. Kjellman on the 

 north and east coasts of Asia, the principal regions being as follows : — 

 Novaja-Zemlja, the Siberian Arctic coast, Behring Strait (Siberian east 

 coast and coast of Alaska). With the results are incorporated those of 

 the earlier Swedish Expedition of 1875. The various collecting-grounds 



