534 Grout .\ Revision of North American 



California, Nevada, Idaho, Montana, Washington Ore 



British Columbia. 



gion, urerron 



M 



and in every way more robust than the type, but has all of the 

 distiiTctive microscopic characters. The same is true of Rcnauld 



Sullivant and Lesqucreux, 



M 



{Hyp 



fairly representative of the species and bears the mature sporophyte 

 which differs little from that of S. illccchnim. The capsule Is a 

 little shorter and there are sometimes as many as four strongly 

 nodose cilia in the endostome : the seta is exceedingly rough with 

 very high papillae : operculum short rostrate when dry. 



There can be no doubt that this should be regarded as a sub- 

 species of ^. illcccbnim. The plants nearest the type are always 

 submerged and nearly always sterile. A complete series can be 

 traced from the t>-pical form described above to t)'pical ^. illccchnan. 

 M. Cardot in Hedwigia 32 : 345. 1893, states that he has come 

 to the conclusion that .9. obtusifolium is a water form of ^. illecc- 

 bnun and states that the latter varies greatly in the characters 

 which separate the two species. He also states that he has found 

 these variations in the same tuft. It seems probable, however 

 from what he says that he had at hand specimens of the more com- 

 mon form of ^. obtusifolium, which is more robust than the t>rpe 

 or than S. iUcccbnun itself. Drummond's 193 is less robust than 

 .S*. illcccbnini. 



M. Cardot ,Tl<;n I'nrfll-mc i-nn fti.f 1,^ «., J •»» Tl -I, 11^ 



Hypniim obtusifolium is a Sclcrop 



t!> 



This fact Prof. Kindberg failed to acknowledge in his publications. 

 Dr. M. A. Howe has collected specimens on moist, shady 

 banks at Berkeley, California, June 28. 1894, that have the leaf 

 characters of the typical form, except that the leaves are longer in 

 proportion to their width. This goes to show that the submerged 

 growth is not the cause of the infiated alar cells, shorter leaf cells 

 and more concave leaves. 



• In some cases the plants are flaccid with more distant, less 

 closely apprcssed leaves constituting forma laxum. 



A form from Coldstream, Vancouver Island, Macoun, May 18, 

 1 88;, has erect branches 3-4 cm. long, strongly curved at the 



