﻿242 Grout : A Revision of the 









cordingly this ground is taken provisionally. Limpricht's descrip- 

 tion of the variety praccox is copied and a full description of the 

 American plant is given. Some discrepancies will be noted. 

 Some of the American forms referred provisionally to var. praccox 

 are more robust than any European material which has been ex- 

 amined. Limpricht says that the true E. diver sifolium is a true 

 alpine moss, "Em echtes Hochalpenmoos," which the E. divcrsi- 

 folium of Lesq. & James and most other American authors is not. 



In the mountainous and boreal regions of the northern United 

 States and Canada west of the longitude of the Mississippi there is 

 found an alpine moss which agrees very closely with Rabenhorst's 

 Bryoth. Eur. No. 1 143 (E. diversifolium), which is cited by Lim- 

 pricht (/. c. 160). This western plant has been referred to E. 

 diversifolium. This view is seemingly contradicted by the fact 

 that Schimper in the Bry. Eur. under E. diversifolium refers to it 

 specimens from Ohio. 



* 



Whatever may be true of the names, the forms described, 

 though intergrading to a considerable extent, are still so well de- 

 fined as to be readily recognized. 



3. Eurhvxchium fallax (Ren. & Card.). 



Earhynchium strigosum var. fallax Ren. & Card. Bot. Gaz, 

 14: 98. 1889. 



Ew-hynchium substrigosum Kindb. Macoun, Cat. Can. PI. 6 : 

 205. .1892. 



Gametopkyte in loosely intricate mats ; robust, green to light 

 yellow-green ; stems 5-10 cm. long, procumbent, arcuate, ascend- 

 ing, often stoloniferous and rooting at the ends, giving off several 

 secondary stems that bear comparatively few branches, branching 

 irregular to subpinnate ; branches 7-1 5 mm. long, terete-foliate, at- 

 tenuate ; branch leaves erect-open, usually long-decurrent, cordate- 

 ovate to lanceolate-lingulate, 0.8-1.2 x 0.4-0.55 mm., rounded-ob- 

 tuse, serrate above, serrulate to the base, concave, usually slightly 

 plicate when dry; costa extending about seven-eighths the length 

 of the leaf, ending in a spine underneath ; median leaf-cells linear, 

 9-12:1; quadrate alar cells numerous; apical cells of various 

 shapes, oblong-elliptical, elliptical, and circular ; stem leaves larger 

 and more narrowed at apex, 1. 2-1. 5 x 0.5-0.8 mm., only the 

 lower and those of the stoloniferous stems acute or long-acuminate : 

 monoicous ; male branches scarce : perichaetial leaves with oblong 









