338 Lindberg, On some species of Polytrichum. 



longitudinaliter dispositse sunt. Cellulae vaginae foliorum breviores 

 et latiores. 



P. decijjiens Limpr. : Lamellae foliorum e latere visae margine 

 crenulato, haud vel paullo incrassato, nee papilluloso, oranes cel- 

 lulae fere aequimagnae; cellulae marginales lamellarum in sectione 

 transversa vulgo inter se dissimiles, sed maxima pars emarginatula. 

 Dorso folii cellulse pro maxima parte transversaliter dispositse sunt. 

 Cellulae vaginae foliorum longiores et multo angustiores. 



I have examined speeimens of P. ohioense from following 

 localities: 



Wisconsin, Milwaukee, leg. Lapham (ex. herb. Cardot). 

 Lake Michigan, leg. Lapham (ex. herb. Cardot). 



Illinois, Chicago, 1888, J. Roll (n. 1811). 



Edgewater pr. Chicago, 20. 9. 1888, J. Roll (n. 1815). 



New Jersey, Hoboken, 8. 1868, P. T. Cleve. 



Massachusetts, Milton, Blue Hill, 2. 6. 1898, 28. 8. 1898, 

 26. 12. 1898, Geo. G. Kennedy. 



District of Columbia, Rock Creek, 10. 6. 1894, J. M. 

 Holzinge r. 



I have seen P. deeipiens from the localities mentioned below: 



Germania, Thüringerwald, Schmücker-Graben, zwischen Fels- 

 blöcken mit P. formosum und alpinum, 14. 8. 1882, K. Schliep- 

 hack e. 



Bohemia, auf Granit am Schmierschlag bei Salnau im Böhmer- 

 walde, 30. 6. 1898, E. Bauer (Bauer, Bryotheca Bohemica, 

 No. 42). 



Finlandia, Prov. Isthmus karelicus, par. Sakkola, inter radices 

 denudatas abietis humi prostratse in abiegno humido inter Taipale et 

 Järisevänniemi, 16. 7. 1895, H. L.; par. Pyhäjärvi, Toubila, in abiegno 

 humido sub radice abietis, 17. 7. 1897, H. L. ; par. Metsäpirtti, 

 Saarois, in abiegno ad terram, 7. 8. 1897, H. L.; Prov. Tavastia 

 australis, par. Korpilahti, Pajusalmi, 11. 8. 1873, E. Wainio 

 (Lang). 



America septentrionalis, Prince Edwards Island (as P. ohioense 

 Ren. et Card, in Canadian Musci, no. 221). To this species 

 belongs also no. 323 in Sullivant et Lesquereux, Musci Bor. Ameri- 

 cani, named P. formosum Hedw. Mr. Cardot refers this form 

 in Botanical Gazette, aug. 1888, to P. ohioense. The speeimens in 

 Musci Bor. Americani are without locality. 



I found in the herbarium of Dr. V. F. Brotherus a peculiar 

 form of Polytrichum sent him by Prof. J. M. Holzinger in 

 Winona, Minn., as P. formosum Hedw. This moss is however 

 quite distinet and is a new and very good species, wich I have 

 named P. angustidens. 



Polytrichum angustidens Lindb. fil. n. sp. 



Planta 4 cm alta, rufo-viridis, robusta, simplex vel vulgo ramosa, 

 densifolia, haud radiculosa. Folia sicca torta, recurva vel erecto- 

 patentia, folia inferiora humida erecto-patentia, folia superiora recur- 

 vula ; lamina usque ad 10 mm longa, basi ca. 0,7 mm lata, sensim in cus- 



