No. XIV. BOTANY. 315 



In Britain this species is exclusively maritime, but it is 

 found in inland stations on the continent of Europe as well 

 as in British North America ; and it, or some other species so 

 closely resembling it as to have been mistaken for it, has 

 been brought from Fuegia, but, like many other species be- 

 longing to the family of Tortuloid mosses, it is not recorded 

 from the United States. 



Tortula (Barbula) icmadophila, Schimper. Floeberg 

 Beach ; a few small barren stems amongst Distichium inclina- 

 tum ; Mushroom Point, in the same condition amongst 

 Zygotrickia leucostoma. This species has not before been 

 seen amongst Arctic mosses, but fine specimens with fruit 

 were in some sets of Drummond's Musci Americani, No. 139, 

 as T. fallax, from banks of rivers near the Rocky Mountains. 

 In Europe, so far as known, it is Subalpine or Alpine. 



T. (Zygotrickia) leucostoma, Brown. Mushroom Point, 

 lat. 82 29' 12" N. ; July 1876; with perfected capsules. 

 Originally described by Brown in the Appendix to Parry's first 

 voyage as a Barbula, it was considered by Bridsl the type 

 of a new genus on account of the peristomial teeth being con- 

 nected below by trabecula3 ; and he thought Hooker and 

 Grreville, who say, in the ' Edinburgh Journal of Science,' 

 under the name of Tortula leucostoma, that the lower half 

 of the peristome is united into a tube, were wrong, and seems 

 himself surprised that Brown should have overlooked the 

 important distinction. The species is entirely Arctic, and 

 belongs to the same group of species as the common European 

 Tortula subulata, a group which may be said to have the 

 foliage and habit of Pottia with the capsules and peristome of 

 Syntrichia. 



T. (Syntrichia) ruralis, Linn. Mushroom Point ; a frag- 

 ment adhering to a piece of Peltigera. Common amongst 

 Arctic mosses, but always sterile. Widely spread in temperate 

 Europe from the sea to Subalpine regions. Inhabits British 

 North America ; but appears to be rare in the United States, 

 and has not been traced farther southwards. 



Didymodon rubellus, Roth. Floeberg Beach, with 



