﻿238 Grout : A Revision of the 



cells much narrower in proportion to their length than in almost 

 all the plants I have seen. The figures of the branch leaves of E. 

 praelongum (Hedw.) in the Bryologia Europea represent the branch 

 leaves of E. Jiians much better than Sullivant's figure. The other 

 European authors who have treated this species since Lindberg 

 wrote seem to have adopted substantially his idea of E. Mans. 



Mr. H. X. Dixon has exchanged a large number of specimens 

 with me and has carefully gone over the evidence of the identity 

 of the European and American plant. He believes that Hypnum 

 atrovircns Swartz, Disp. 65. 1799, is also identical with E. liiaus. 



2. Eurhvnciiium strigosum (Hofim.) Br. & Sch. Bryol. Eur. 



fasc. 57-61, pi. jip. 1854. 



Hypnum strigosum Hoffm., D. Fl. 2: 76. 1796. 



Hypnum ihuringicum Brid. Muse. Recent. 2 2 : 99. pi 3- f> 2 - 



1 80 1. 



Hypnum pulcJidlum Hedw. Sp. Muse. 268. pi. 68 f. /--/. 1801. 



Hypnum vdutinoides Voit. Muse. Herbip. 99. 18 1 2. 



Rhyncliostcgium strigosum De Not. Cronaca, 2 : 11. 1867. 



Gamctophytc in wide loose mats, with a habit much like 

 Brachythccium velutinutn, green to yellow-green, stems creeping, 

 densely radiculose, 5-10 cm. long, often stoloniferous at the ends, 

 pinnately to subfasciculately branching ; branches 3-8 mm. long, 

 ascending or erect, terete -foliate, often appearing somewhat com- 

 planate foliate when dry, attenuate at the ends ; branch leaves 

 from the middle of the branches erect-spreading, ovate-lanceolate, 

 very slightly, or not at all decurrent, 0.7-1 x 0.3-.55 mm., 

 acute or often obtuse, especially towards the ends of the branches, 

 sharply serrate above, concave, little or not at all plicate ; costa 

 extending four-fifths length of leaf, ending in a spine underneath, 

 median leaf-cells linear, 7-10 : 1 ; quadrate and oval alar cells few, 

 apical cells conspicuously shorter and broader, oblong-rhomboidal, 

 2-3 : 1 ; stem leaves elongated-triangular-ovate, more or less 

 long-acuminate, gradually slender pointed, somewhat decurrent, 

 serrate, 0.9-1.2 x 0.4-0.6 mm.; apex often twisted half around 

 to the right ; leaves of the stoloniferous stems, triangular-ovate, 

 abruptly long-acuminate, ecostate, 0.7-5 X 0.3 mm.: dioico.us or 

 pseudo-monoicous, "annual buds containing antheridia adhering 

 to radicle of fertile plants;" perichaetial leaves with sheathing 

 bases and spreading points, oblong, narrowed to a slender subfili- 

 form spreading acumination, ecostate, distantly serrate. 



