284 CARDOT AND THERIOT [3 2 4l 



Mnium insigne Mitt, in Hook. Journ. of hot., 1856, p. 230. 



From Alaska, sine loco (Evans, 1897) ; Wrangell (Trelease, 1711) ; 

 Cape Fox (Trelease, 2380); Sitka (Trelease, 1714^, 1716); St. 

 Paul Island (Trelease, 2069). New to Alaska. 



Mnium spinulosum Br. eur., fasc. 31, Suppl. p. 4, pi. 4. 

 From Skagway (Canby, 480). 



Mnium punctatum elatum Sch. Syn., ed. i, p. 398. 



From Port Wells (Trelease, 1723, 1724; Coville and Kearney, 

 1294) ; Indian camp, Yakutat Bay (Brewer and Coe, 642 in part) ; 

 Disenchantment Bay (Trelease, 1717) ; Cape Karluk (Brewer and 

 Coe, 687); Sitka (Trelease, 1715 in part); Kodiak (Trelease, 

 1725) ; St. George Island (C. Hart Merriam in 1891). 



Mnium punctatum anceps var. nov. 



A forma typica differt foliis saepe cucullatis cellulisque superioribus 

 multo minoribus, fere isodiametricis ut in AT. glabrescente, sed ab 

 illo limbo haud incrassato distincta. 



From Unalaska (Trelease, 1727). 



Mnium nudum Williams in Bryologist, 1900, p. 6. 



From Yakutat Bay (Trelease, 1721). New to Alaska. 



This specimen agrees exactly with M. nudum Williams, from Idaho 

 and Montana. Mr. Williams mentions as distinctive characters for 

 his species, in comparison with M. punctatum, nothing but the un- 

 thickened margin of the leaf and the naked, not radiculose stems. 

 Now, in the European specimens of M. punctatum var. elatum, it 

 very often happens that the margin of the leaf is not thickened at all 

 or only slightly towards the base ; this character, therefore, is not valu- 

 able. But, besides the naked or hardly radiculose stems and the 

 smaller height, M. nudum differs from M. punctatum var. elatum 

 by a more regularly hexagonal areolation, the cells towards the 

 margins being larger (45-55 p. instead of 28-35) and the ones near the 

 costaof the same length as in the allied species (70 ioo/i) but broader 

 (50-60 /i, instead of 40-45) ; and the lid of M. nudum is shortly apic- 

 ulate, while in M. punctatum it is rather long beaked. However, 

 these distinctive characters are not of great importance, and it seems to 

 us preferable to regard M. nudum as a subspecies of M. punctatum. 



Mnium glabrescens Kindb. Notes on Canad. bryol., 1893. 



From Alaska, sine loco (W. H. Evans, 1897) ; Farragut Bay (Tre- 

 lease, 1712, 2417; Brewer and Coe, 611, 614); Orca (Trelease, 

 1722,2248; Setchell, 1200); Port Wells (Trelease, 2265); Sitka 



