ISOTHECII. 153 



Hook. If Wils. t. xiv. ; Eng. Bot. t. 1085. ; {Moug. &f Nest. 

 n. 817.) 



On rocks, walls, and trunks of trees, in subalpine districts. 

 Bearing fruit in November. 



Dioicous. Primary stem or rhizoma creeping, secondary 

 suberect, dendroid, nearly naked below ; branchlets arcuate, 

 filiform ; leaves closely imbricated, ovate, acute, serrated above, 

 not papillose, two-nerved at the base ; leaf-cells at the angles 

 minute, gradually increasing in size upwards, where they are 

 obliquely elliptic and subrhomboid, longer and narrow towards 

 the centre of the base, and occasionally at the very apex ; 

 fruitstalk \ an inch long, red; sporangium subcylindricai ; 

 lid shortly rostellate. 



29. LESKEA, Hedw. 



Sporangium erect, symmetrical ; peristome double; cilia of 

 inner peristome wanting or abortive ; leaf-cells roundish, pa- 

 pillose, with thick cell-walls. 



1. L. polycarpa, Ehr. ; stem creeping, more or less divided; 

 branches often irregularly pinnate, suberect, slightly curved 

 and thickened at the end ; leaves spreading or subsecund, im- 

 bricated, ovate, pointed ; nerve reaching almost to the tip ; 

 sporangium erect, subcylindricai ; lid conical. — Hook, fy Wils. 

 t. xxiv. ; Eng. Bot. t. 1922. ; {Moug. §• Nest. n. 224.) 



At the roots of trees and stones, especially near water. 

 Fruiting in early summer. 



Monoicous ; forming yellowish or dull-green intricate tufts. 

 Stem slender, creeping or procumbent, more or less divided ; 

 branches irregularly pinnate or slightly divided; divisions 

 swollen at the tip ; leaves spreading or subsecund, ovato-lan- 

 ceolate, concave, attenuated but not acuminate, ending ob- 

 tusely with a strong nerve running nearly to the tip ; cells 



