OF MARINE COASTS. 12!) 



Common in EuiopL'. from Mediterranean to tiic Arctic, iiiid in 

 ISTorthern Asia. 



•/. falcatus iley. 



Perennial, with slender, creeping rootstock; stems 15 — 2.5 cm. high, 

 leafv, terete, in compressed tufts. 



Driftsand at Pacific Grove, vSan Francisco and other places on 

 C'alifornian coast. 



J. maritirnvs Lam. 



Perennial, with densely tufted stems, horizontal rhizome, rigid, 6 — 10 

 dm. high, with sheathing scales at base, of which one or two inner ones 

 terminate in a rigid, terete, pungent stem-like leaf, shorter than the 

 real stems; flowers in little clusters. 



In maritime marshes and moist sands on shores of Atlantic Xorth 

 America, Europe from Mediterranean to the Baltic, where rare, Caspian 

 Sea, and in K"ew Zealand; Tasmania, and Australia from Queensland 

 to Western Australia. Also in the interior of Australia. 



XAJADACEAE. 



Najas marina L. 



Slender, branching, submerged plant, with stout stems, often armed 

 with prickles twice as long as their breadth; leaves linear, with 6 — 10 

 spine-pointed teeth on each margin; the broad sheathing base entire or 

 with few teeth on each side. 



Widely distributed in Europe, temperate and tropical Asia, Algeria. 

 Xorth America. W&st Indies, Brazil, Australia, and Hawaiian Islands. 



PhyUospadix Scouleri Hook. 



Submerged maritime herb, with elongated, narrow-linear, radical 

 leaves, 1.5 — 5 mm. wide, from much-branched, creeping, brittle root- 

 stock. 



Together with another species, E. Torreyi Wats., from which it does 

 not differ essentially in habit, growing on sand covered stones and rocks 

 on the submerged beach of the Pacific coast of Xorth America. 



Potamogeton marvnus L. 



Perennial marine plant, with filiform, branched stem ; very leafv : 

 leaves narrow-linear, 5 — 15 cm. long, 1 mm. broad. 



In salt water in Europe and Xorth America. Often confused with 

 the following species. 



