NO, I MEXICAN MOSSES — THERIOT 9 



authentically named! But where a variable species is concerned, a 

 single stem can not give an accurate and complete idea. This stem 

 constitutes simply a form of the species, and its comparison with the 

 others makes them appear, very often, as if they were distinct species. 

 Such are the reasons why my opinion about these debatable species 

 is founded more on the mosses I had to identify than upon the small 

 fragmentary authentic specimens at hand ; hence it seems useful to 

 say how I understand them. 



BRACHYMENIUM CAPILLARE Schimp. in Besch. Prodr. Bryol. Mex. 50. 1871 



Innovations not julaceous, rather laxly foliated; leaves oblong, 

 obtuse, the margins plane or almost plane, the costa excurrent ; stem 

 and perichaetial leaves obtuse-lanceolate, strongly revolute. Capsule 

 cylindrical. 



Puebla: Esperanza (4508, 4659- 4668, 4669, 4682, 4992). Morelia: 

 Campanario (7461, 7463). 



No. 4992 is a form with larger leaves, and nos. 7461 and 7463 a 

 form with a thicker capsule. 



BRACHYMENIUM LUTEOLUM (C. M.) Jaeg. 

 Bryum iutcolmn C. M. Linnaea 38 : 625. 1874. 



Close to the preceding species. Differs by julaceous innovations 

 with densely imbricate leaves, which are oval-suborbicular. 



Puebla: Hacienda Batan (s. n.). MoreHa : Bosque San Pedro 



(4579) • 



BRACHYMENIUM IMBRICATUM Schimp. 

 Bryum imbricatifolium C. M. Syn. 2 : 578. 1851. 



As in S. luteolum, with julaceous innovations ; leaves strongly im- 

 bricate, but in both the stem and branch leaves the costa almost always 

 disappearing below the apex. 



Puebla: Hacienda Alamos (4718, 47^1, 4759^ 4865). 



BRACHYMENIUM MUNCHII Broth, in Card. Rev. Bryol. 38: 5- i9" 



Julaceous innovations with oval or oblong leaves, narrower at the 

 apex and almost acute. The stem and perichaetial leaves are subobtuse 

 or acute, with a strong (60 /a) costa always excurrent. 



Puebla: Esperanza (4943); Mahnche (6004); Hacienda Batan 

 (4973)- 



