Britton : Bryological notes 263 



teeth on the back are pecuhar in A, abietina^ and resemble those 

 o{ Pterogonium gracile^ though the size and habit of the plants is 

 quite distinct, as well as the leaf-characters. 



Most bryologists will admit that Leptodon Smithii and Z. Uiclio- 

 initrion are not congeneric and accept Forsstroemia Lindb. for the 

 latter and its allied species ; but Paris' Index\ although accepting 



r 



both genera, limits Forsstroeniia to F. trichomitrion (Hedw,) Lindb. 

 and some other exotic species, and leaves most of our North 

 American species in Leptodon with L. Smithii. Kindberg is more 

 nearly correct in the list of species he includes, but Cryphaca 

 Ravenelii belongs where Austin placed it ! 



Jaeger in the Adtimbratio listed three of our species under 

 Lasia Beauv. 1805 ^^^^^^ Bridel) but this generic name is antedated 

 hy Lasia Loureiro, 1790, and that is why Lindberg substituted 

 Forsstroemia in 1862. Sullivant made an anagram oi Lasia when 

 he described Alsia because of the resemblance between Lasia 

 trichomitrion (Hedw.) Beauv. and Alsia californica Sull. This is 

 the type species of Alsia and its synonymy is as follows : 



Alsia californica (Hook. & Arn.) Sull. Proc. Am, Acad. Arts 



&Sci. 3: 185. 1857 ; Muse. Wilkes Exp. 25. //. 25. 1859. 



Neckera californica Hook. & Arnott, Bot. Beechey Exp. 162. 



1833. 

 AntitricJiia psejido-californica Kindb. Eu. and N. A. Bryin. 9. 



1897. 



It started as a monotypic genus, and it was not till 1864, in 

 the Icones, that Sullivant enlarged the genus to include Neckera 

 abietina Hooker. This was undoubtedly a mistake which Kind- 

 berg has detected, but failed to rectify in the correct way. I 

 therefore propose the following new name : 



Dendroalsia 



Type species : Dendroalsia abietina (Hook.) 



Neckera abietina YiQQ\^.^\x%z. Y^y^oWcA pL 7. 18 18. 



Pilot ricJium abietinum Brid. Bryol. Univ. 2 : 258. 1827. 



Type locality: N. VV. Coast of North America. Menzies, 

 1792. 



Type in herbarium of Hooker. 



These plants were figured 6 inches high, with stems naked 



