8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 8l 



MNIOBRYUM ALBICANS (Wahlenb.) Limpr. Laubm. Deutschl. 2: 277. 1895 

 Mnium albicans Wahlenb. Fl. Lapp. 353. 1812. 



Puebla: Rio San Francisco (5005). Morelia: Rincon (9436). 

 Distrito Federal : Tlalpam (9500). 



EPIPTERYGIUM MEXICANUM (Besch.) Broth. 



Valle de Mexico: Desierto {Bro. Amabic). Growing as isolated 

 stems among other mosses. 



BRACHYMENIUM BARBAE-MONTIS C. M. 



Puebla: Tepoxiichitl (s. n.). Morelia: Andameo (4820). Tlax- 

 cala: Acuitlalpilco (743 in part). 



The last number differs from the others by its broader leaves, 

 revolute for a longer distance, with a short apiculus. It is perhaps 

 more than a form, but unfortunately the specimens are absolutely 

 sterile. 



BRACHYMENIUM EXIGUUM Card. Rev. Bryol. 38: 7. 191 1 



Puebla: San Antonio (Bro. Nicolas 6028); Cerro Guadalupe 

 (660). 



BRACHYMENIUM MURALE Schimp. in Besch. Prodr. Bryol. Max. 51. 1871 



Puebla: Rancho Posadas (4804). Veracruz: Cordoba (s. n.). 



BRACHYMENIUM Sect. LEPTOSTOMOPSIS 



I recognized in this section among Brother Arsene's mosses the 

 following species: B. capiUare Schimp., B. lutcolimt (C. M.) Jaeg., 

 B. imbricatum Schimp., B. Munchii Broth., B. clilorocarpum Card., 

 B. Lozanoi Card., B. iiivcitiii Besch., and B. condensafum R. S. 

 Williams. 



Among these numerous species, the last three are easy to distin- 

 guish : B. Lozanoi by its leaves distinctly and finely serrate near the 

 apex ; B. nivcuni and B. condensafum by their leaves widely marginate 

 and finely dentate at the apex. 



It is not the same for the others. The determination of the numer- 

 ous specimens has been a laborious and delicate task, because, accord- 

 ing to my observations, among the characters attributed to each one 

 of these species few are constant. And yet I had before me, for 

 every one of them, a fragment of the type or of some other plant 



