180 ICONES MUSCORl'M. 



Subject to considerable variation in size, habit, acnmi nation of 

 leaf, Sec. Not easily distinguished from Hypnum salebrosum, 

 Hoffm., except by its dioicous inflorescence and usually more 

 slender subcrect and less curved capsule. 



The foregoing description and the drawings for Plate 115 are 

 from specimens labelled " H. 20. Coll. Dewey." in the Herbarium 

 of Dr. Torrey. Bridel (Bryol. Univ. 1. c.) refers to North Amer- 

 ican specimens from Torrey thus labelled as the materials on 

 which he established his Hypnum latum; hence there can be 

 little question that the specimens first mentioned are also au- 

 thentic for the true Hypnum latum, Brid., a species about which 

 some doubts have heretofore prevailed. 



TAB. 115. — Hypnum lettjm. 



1, 2. Plants femineae et masculte naturali magnUudine. 



3. Pars ramuli. 



4, 5, 6. Folia ejusdem. 



7, 8, 9, 10. Portioncs folii arcolationem exhibentcs. 



11. Sectiones transversales folii. 



12. Perichsetium cum pedicelli basi. 



13. 14. Folia perichaetialia. 

 15, 16. Capsula? operculatae. 



17. Particula peristomii. 



18. Sectio verticalis ejusdem. 



19. 20. Operculum et calyptra. 



21. Perigoniale et antheridium cum paraphysi. 



