648 NAlADACE^l. POND-WEED TRIBE. 



4. ZOST^RA (Grass-wrack). 



1. Z. marina (Grass- wrack). A submersed marine 

 aquatic, with long, cord-like stems, and bright green, 

 grass-like leaves, some of which serve as sheaths to the 

 bead-like rows of small simple flowers. The dried leaves 



ZOSTERA MARfNA (Grass-wrack). 



and stems are used as beds, and are also employed in 

 packing glass. The inner fibre has been recommended 

 as a substitute for cotton. M. July, August. Perennial. 



