PLANTS OF CHATHAM ISLAND. 



63 



Carex appressa var. sectoides. 

 FIGURE 45. 



This Carex is found in marshy ground, generally on the side of a 

 rivulet, in association with Phormium tenax. It is a large species, 

 often 2 feet to 4 feet high, and its rhizomes often form a kind of 

 trunk; the culms are slender and drooping above, leaves numerous, 

 almost ^ inch broad, hard, rigid and acutely keeled. 



Marchantia cephaloscypha? 

 . FIGURE 45. 



This cui'se among your pots and ferneries " came as a boon 

 and blessing to man on the upland bogs; it thrives where the slope 

 of the ground makes it too difficult for the Sphagnum ; in such a place 

 where a small trickling rivulet would gush over its banks after a 

 shower of rain, here it takes possession, covering half an acre, more 

 or less, - and forms a hard crust, over which it is safe to walk; but 

 a 6- foot pole driven through it would not touch the bottom. 



