246 THE JOURNAL OF BOTANY 



Paris, have transferred D. brachycarpum Hampe to the synonymy 

 of Blindia ferruginea. They also give — 



11 186. D. brachycarpum CM., Symb., No. 166 ; L. cylindri- 

 carpum Hpe. N.S.W., Blue Mts. : F. v. M., 72. 

 D. brachycarpum, Hpe. See No. 220 (Blindia ferruginea). 

 D. cylindricarpum, Hpe. See No. 186." 



From this it would seem that D. brachycarpum CM. in Hedw., 

 1898, p. 112 (Symbolae ad Bryol. Austral.) was a different plant 

 from Hampe's species of the same name. This, however, is not 

 the case. I have examined the types of both plants in Hampe's 

 and C Midler's herbaria. They are identical, and represent the 

 same gathering, "N.S.W., Blue Mts., F. v. Miiller." Probably 

 C Miiller had his specimen labelled with the name D. brachy- 

 carpum, and forgetting that it was Hampe's name and had already 

 been published by him, described it as his owm species in the 

 Symbol® (Hedw., 1898). 



I have not examined D. cylindricarpum, either of Hampe or 

 C. Miiller, and am unaware how far they should figure in this 

 synonymy, which should read as follows — 



Ditrichum brachycarpum Hampe in Linn., 1872, p. 514. 



Syn. Leptotrichum brachycarpum CM. in Hedw., 1898, p. 112. 



Distr.— Australia (N.S.W.). 



Weisia Welwitschii Schimp. Syn. Ed. 2, p. 52. 



Limpricht (Laubm. Ill, 682) gives Weisia welwitschii Schimp. 

 as a synonym of Campy lostelmm strictum Solms. ; in this he has 

 been followed by all or most subsequent authors. He does not 

 give his authority for the reduction, nor does he mention having 

 himself examined Welwitsch's plant. 



Having occasion recently to study C. strictum, I examined 

 Welwitsch's plant in Schimper's Herbarium at Kew (" 346, ad 

 cataractas, Sa. de Cintra, Maio, 1849 "). There is an extremely 

 close resemblance between the leaves of the two plants, but a 

 closer examination, especially of the fruit, show-s that they are 

 perfectly distinct. 



In the first place, C. strictum is a dark green plant of hard 

 granite rock, while the Weisia is a bright green moss, growing on 

 very distinctly calcareous, white and chalky-looking soil. The 

 areolation of the leaves, while superficially similar, is less so 

 when carefully examined. In the Campylostelium the cells are 

 in two strata at margin for a great part of the lamina (as 

 in C. saxicola), incrassate, not crowded, and the hyaline cells 

 at base occupy a very short space. In W. Welwitschii the 

 cells are comparatively thin-walled and therefore closer, chloro- 

 phyllose, and in one layer throughout ; and the hyaline basal 

 cells occupy a considerably larger area of the leaf. The nerve, 

 also, is wider and more solid in the Weisia. 



The capsule in the Weisia is quite different, short, elliptical, 

 slightly asymmetrical, very different from the subcylindrical, 

 exactly symmetrical, pachydermatous capsule of C. strictum, 



