Ipostelsia 95 



POTAMOGETON PUSILLUS L. Sp. PI. 1 27. I 753. 



In Lake San Juan. Aug. 7. R. 898. 



ZosTERA MARINA L. Sp. PI. 968. 1 753. In shel- 

 tered places of San Juan Harbor. Found 

 occasionally on the beach by the Minnesota 

 Seaside Station after heavy southwest storms. 

 Aug. 12. R. 919. 



Phyllospadix scouleri Hook. Fl. Bor. Am. 

 2:171. 1838. Common in tide pools and on 

 jagged rocks below the half tide mark. July 

 23. R. 814. 



JUNCAGINACE.^ 



Triglochin maritima L. Sp. PI. 105. 1753. In 

 moist turf on the rocky beaches. June 28. 

 R. 67. 



GRAMINE.^ 



Panicum unciphyllum Trin. Gram. Panic. 242. 

 1826. On rocky beaches, crevices of the 

 slate rocks. July 10. R. and B. 107. 



Agrostis exarata Trin. Gram. Unifl. 207. 1824. 

 On steep, rocky beaches. Straits of Fuca 

 and on sandy shores of Lake San Juan. A 

 very variable species. July 22, 25. R. 806,819, 



