﻿234 Grout : A Revision of the 



broadly cordate-ovate, decurrent, abruptly long-acuminate stem 

 leaves, and pinnate branching. 



III. The group of E. myosuroides, including E. my osier aides 

 and E. stolonifcram. This group is easily recognized by the 

 -shorter operculum and the small thick walled alar cells. 



Apical cells of branch leaves oblong-rhomboidal to circular.* 



Seta rough. 

 Seta smooth. 



I. E. hians. 



Leaves spreading. 



6-9.9 mm. long. 2. E. strigostim. 



Branch leaves 1-1.5 mm. long,f round-obtuse at apex. 



3. E. fallax. 

 Leaves appressed-imbricate. 



Alpine or boreal ; usually in dense mats or cushions ; slender. 



4. E. diversifolium. 

 Lowland; in looser mats ; more robust. 2b. E. strigosum praecox. 



Apical cells of branch leaves not differentiated. 



Alar cells merely broader and shorter than the median ; operculum long rostrate. 

 Seta smooth or nearly so ; stem leaves nearly entire. 



6. E. Brittoniae. 

 beta rough ; stem leaves serrate. 



Slender ; variously branching, leaves not more than I mm. long. 



5. E. praelongum. 

 Very robust; closely and regularly pinnate; branch leaves I -1. 5 mm. 



lon g- 7. E. Oregauum. 



Alar cells minute, thick- walled ; operculum conic or short rostrate. 



Branches seldom flagelliform ; branch leaves 1-1.5 mm. long; plants of 



eastern North America. 8- Em myosuroides. 



Branches often very long, flagelliform; branch leaves 1. 5-2 mm. long; 

 plants of the Pacific slope. 9 . Et stoloniferum. 



I. EURHYNCHIUM 



hians (Hedw.) Jaegr. & Sauerb, St. Gall. Nat. 

 Gesell. 1876-77: 357. 1878. 



Hypmm hians Hedw. Sp. Muse. 272,//. 70,/ n-14. 1801. 



Hypnum p 



ipiculatum 



pi. 20. 1797 



1: 137. 



1 



806. 



pi 8 (Excl. van). 1854. 



Hyp) in m dist 



praelongum Br. & Sch. Bryol. Eur. fasc. 57-6 



1879. 



Gamctophytc in intricate, depressed mats, green to yellow- 

 green, closely adherent to the substratum ; stems 3-10 cm. long, 

 creeping, strongly radiculose, little divided, extensively stolonifer- 



*E. stolon if emm myurcellum will be sought here~ ~~ 



f£. strigosum robustum has as large leaves, but they are acute. 



