»8 DICRANACE/E. 



smooth; peristome teeth cleft at apex or undivided, articulated 

 and internally barred. 



The two species of this genus are closely allied to Cynodon- 

 tium, especially to C. Bruntoni, but the presence of distinct 

 angular cells, in D. crispula particularly, is sufficient to justify 

 the present arrangement. 



/Leaves with narrow, acute points; capsule oval-elliptic 2. crisp 



\Leaves with shorter, subacute points ; capsule cylindric /. cirrata 



1. Dicranoweisia cirrata Lindb. (Mnium cirrhatum L., 



Weisia cirrhata Hedw., plur. auct.) (Tab. XV. M.). 



Plants in close tufts or cushions, soft, dull or yellowish green, 

 about i inch high. Leaves spreading, flexuose, closely crisped 

 when dry, concave' deeply channelled on the upper side of the 

 nerve, from a lanceolate base linear-lanceolate, gradually 

 narrowed to a not very acute point ; margin recurved, especially 

 in the middle of the leaf, entire ; nerve reaching to apex, but not 

 excurrent. Upper cells small, regularly rounded-quadrate, 

 smooth, below gradually becoming rectangular, larger, at base 

 pellucid, broadly rectangular, lax, with thin walls ; two or three 

 rows of basal cells often coloured yellowish, but hardly otherwise 

 distinct. Capsule on a pale seta {\-\ inch long), erect, 

 cylindrical, pale, with a narrow red mouth, smooth, thin-walled ; 

 calyptra narrow, shining ; lid obliquely subulate-rostrate, long ; 

 annulus broad. Peristome teeth undivided, red below, pale 

 above, inserted below the mouth. Autoicous. 



Hab. On trees, fences and thatch, sometimes on rocks ; common. Fr. winter. 



Usually in small compact cushions and abundantly fertile. The capsule is some- 

 times very slightly curved. The entire leaves and narrow capsule distinguish this 

 plant from Cynodontium Bruntoni ; the shorter seta, longer and narrower capsule, 

 and revolute leaf margin separate it from the next species, the lower cells also are 

 smaller. It has also some resemblance to Dicranum montanum, but the leaves of the 

 latter will be seen even with a lens to be very rough and denticulate in the subula. 



2. Dicranoweisia crispula Lindb. (Weisia crispula Hedw., 



plur. auct.) (Tab. XV. N.). 



In dense cushions, bright or dark green above, black below. 

 Leaves spreading, often secund above, strongly crisped when dry, 

 longer, from a broader base more quickly narrowed to a longer,, 

 narrower, flexuose, concave subula, acute at apex; margin 

 plane, quite entire; cells mamillately papillose above, resembling 

 the last, but smaller, more incrassate, narrower below and less 



