NO. 4 MEXICAN MOSSES— THERIOT 3 I 



HEDWIGIACEAE (continued) 

 HEDWIGIDIUM IMBERBE (Sm.) Bry. Eur. 



\'alle de Mexico: Salazar, on trunks of trees (Bro. Aiuablc 1294 

 p. p.). 



A new genus for Mexico, also, I believe, for all of North America. 

 This number (1294) was made vip of a close intermixture of four 

 species, two of them predominant: Hcdzvigidium imberbe and Neo- 

 cardotia sitbiiigra; the two others, Hedwigia albicans var. viridis and 

 Braunia sccunda, were represented by a few plants only. 



It was an easy matter to separate Ncocardofia sitbnigra and Hcd- 

 zvigia albicans, but quite another thing with regard to Braunia sccunda. 

 whose presence I did not even suspect. If some fruiting plants had 

 not been present this species would have been overlooked, its size and 

 appearance being so similar to those of Hedwigidiuni imberbe. 



It is rather unusual to find, associated in such a manner, two species 

 that are indistinguishable either to the naked eye or by the use of a 

 hand lens except by their fruit ; and it is even more unusual to be 

 unable to find morphological and anatomical characters by which to 

 separate them. The form and size of the leaves, recurvature of the 

 borders, plication of the lamina, and areolation, all are identical. I do 

 not know of another example of such an association and such a 

 similarity. 



AMBLYSTEGIACEAE 



CAMPYLIUM CHRYSOPHYLLUM (Brid.) Bryhn, Explor. 61. 1893 

 Hypiiitui chrysophyllum Brid. Muse. Rec. 2": 84. pi. J. 1801. 

 Morelia: Loma Santa Maria (7870). 



CAMPYLIUM HISPIDULUM (Brid.) Mitt. var. SOMMERFELTII (Myrin) 

 Lindb. Muse. Scand. 38. 1879 



Puebla: Rancho Guadalupe (4602). Morelia: Cerro Azul (4561) ; 

 Loma Santa Maria (5103, 5105, 7859 p. p.) ; Campanario (7462 

 p. p.). Valle de Mexico {Bro. Aniablc) : Desierto (1222 p. p., 1238, 

 1432) ; Contreras (1462, 1490). 



AMBLYSTEGIUM SERPENS (L.) Bry. Eur. 



Distr. Federal: Tlalpam (9493). 

 This species seems to be new to Mexico. 

 3 



