CRITICAL NOTES ON NEW AND OLD GENERA OF PLANTS 



Thamnobryum ellipticum (Kindb.) 



Thamnium piimilum (Kindb.) 

 Thamnobryum latifolium (Kindb.) 

 Thamnium latejolium (Kindb.) 

 Thamnobryum Bilgelovii (Sull.) 

 Thamnium Bilgelowii (Sulb.) Kindb. 

 Thamnobryum angustifolium (Holt) 

 Thamnium angustijolium Holt 

 Thamnobryum alleghaniense (C. Miill.) 

 Thamnium alleghaniense (C. Mell) Bryol. Eur. 

 Thamnobryum Leibergii (E. Britt) 

 Thamnium Leibergii E. Britt. 

 Thamnobryum pseudoneckeriodes (Kindb) 

 Thamnium pseudoneckeriodes Kindb. 

 Thamnobryum microalopecurum (Kindb) 

 Thamnuna microalopecurum Kindb. 



ZONARIA 



The Zonaria J. Agardh 1 (1872) was anticipated by the name 

 published by Strudel (1841) 2 True the latter was really a Zornia, 

 and apparently a misprint for that name. The question arises 

 whether an accidentally published name deserves to invalidate 

 the later published one. In any case the name seems to have been 

 used and the more so likely to be a cause of invalidation under 

 the principle, "once a synonym always a synonym," as it appeared 

 under Steudel's list of Walter's " Anonymos." It might be remotely 

 possible at that — that a new generic name were suggested. In 

 any case by strict interpretation of the law, the Agardhian name 

 would seem to be rendered a homonym. 



1 ' illania may be used for the name of the alga. Villan' after 

 whom the plant genus is named wrote about algae as early as 1782. 



Villania Nom. Nov. 



Zonaria']. Ag. (1872) not Steudel, (1841) 1. c. 



Villania flava (Clem). 



1 Agarh, J., Til Algernes Systematik, Nya bidrag II. Zonaria (Lund.) 

 Univ; Arsskrifit, t. g. (1872). 



* Steudel, E. T., Nomenclatture Bot. 2nd. ed. (1841) p. 101. 



:i Observations (Confenae Sp. Byssus lanuginosa) in aguis sulphmeis 

 Croft prope Darlington). London (1782) (8) [See Pntzel 2nd ed. p 404] 



