32 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 85 



AMBLYSTEGIUM VARIUM (Hedw.) Lindb. var. ARSENEI (Par. & Broth.) 



Ther., var. nov, 



Amblystcghnn Arscnci Par. & Broth., Ms. 



Puebla: Rio San Francisco (5004). Valle de Mexico: Tlalpam 

 {Bro. Amable 1453). 



I had previously received this plant from E. G. Paris under the 

 name A. Arsenei Par. & Broth., sp. nov., likew^ise from Rio San 

 Francisco. Indeed, at first sight it would appear different from 

 A. varimn in several respects: (i) Its narrower leaves; (2) its 

 greatly developed perichaetium, the perichaetial leaves being almost 

 4 times longer than the cauline leaves; (3) the capsule not arcuate 

 when dry. 



These characters, however, fade out to some extent upon close 

 examination: (i) In A. varium the form of the leaves is very vari- 

 able; (2) if specimens of A. varium are found with an inconspicuous 

 perichaetium and short perichaetial leaves, there are others whose 

 perichaetium is as well developed as in A. Arsenei; (3) there remains 

 only the character afiforded by the form of the capsule. This last is 

 not sufficient to justify the recognition of a species. 



AMBLYSTEGIUM ORTHOCLADUM (Beauv.) Jaeg. 



Puebla: Finca Guadalupe {/S?) ', Hacienda Alamos (4723, 4725). 

 Morelia: Bosque San Pedro (4569). 



The last plant, probably half submerged, is a form with greatly 

 elongated stems and branches and a thicker nerve (60 ju,). 



AMBLYSTEGIUM RADICALE (Beauv.) Mitt. Muse. Austr. Amer. 569. 1869 



Puebla: -Hacienda Batan (934); Rio San Francisco (5000). 



Plants sterile, the determination only probable. The plant from 

 Rio San Francisco has the stems and branches laxly foliate and 

 the larger leaves widely spreading, either dry or moist. 



AMBLYSTEGIUM JURATZKANUM Schimp. 



Valle de Mexico: Tlalpam (Bro. Amahlc 1346 p. p.). 



The nerve extends well into the apex of the leaf. This is almost 

 the only difference I could find, as compared with the preceding 

 ])lants identified as A. radicale. 



AMBLYSTEGIUM HYGROPHILUM (Jur.) Schimp. 



Puebla: Hacienda Batan (5008). 

 A new species for Mexico. 



