﻿254 # Grout : A Revision of the 



9b. EURHVXCHIUM STOLONIFERUM MYURCELLUM (Kindb.). 



Isothecium myurcellum Kindb. /. c. 



Branches seldom flagelliform, having a much smoother subju- 

 laceous appearance due to the shorter, more appressed leaves; 

 branch leaves ovate-lanceolate to ovate -elliptical, obtusely acute to 

 short-acuminate, 1-1.2 x 0.3-0.4 mm., coarsely, often doubly, 

 serrate above, concave; median cells 5-7 : 1, the upper shorter and 

 broader ; apical cells rhombic-elliptical, 2-1 : 1 ; round-quadrate 

 alar cells more numerous. 



On stones and decaying logs. 



Vancouver Islar 

 Macoun : Marin 



Sonoma Counties, California, M. A. Howe. 



Exsiccati. Macoun, Can. Muse. 397, and 292 in part. 



By reason of its habit and short pointed branch leaves with 

 well differentiated apical cells, this variety also seems a good spe- 

 cies at first sight, but all the intermediate forms of leaves can fre- 

 quently be found in the same tuft and sometimes even on the same 

 plant. 



DOUBTFUL SPECIES. 

 Eurhynchium Dawsonii Kindb. Bull. Torr. Bot. Club, 17 : 27S. 



1890. 



■topJiy 



r .~j,.~ ...1 w.m U1UH.CH.C iiicils, uuiy green, uiancxica >-^r 



with bright somewhat glossy green leaves ; branch leaves loosely 

 intricate, slightly or not at all decurrent, ovate, more or less long- 

 acuminate, concave, serrulate above, margins slightly reflexed at 

 base, 1 -1. 2 x 0.5 mm. ; costa very stout, extending four-fifth 

 length of leaf; median cells oblong-linear, 6-8 : 1 ; area of quad- 

 rate alar cells large. Sporophyte not seen. 



Described from a specimen bearing this label, "On stones 

 ditch west side of Black's Hotel, Hastings B. C, April 29, 1889 



Resembling h. crassinervum in the stout costa, broad leaf-cells 

 and numerous quadrate alar cells ; differing in the slender habit 

 and smaller ovate branch leaves. 



The following is the original description : 



in 



V 



" Stems densely pinnate, not or rarely radiculose ; branches 

 patent. Leaves green or brownish, not glossy, not or indistinctly 

 papillose, not long-acuminate from the broad ovate base, recurve 

 on the borders below, long-decurrent, open-erect, denticulate a 



J 

 all 



