140 NAI ADACE/E. 



P. PUSHIUS, Linn. 



3. Starrick Moor, St. Austell, Tresidder. 



5. In a rapid stream flowing into Holy well Bay, with long 

 peduncles, 1915, Rilstone. " Here it might be said the stream 

 induces the lengthy peduncles, but longer are produced on 

 a var. of the species on Sable Island off the Canadian coast, 

 where the plant grows in a lagoon.*' A. Bennett, B.E.C., 

 1917, p. 252. 



Var. tenuissimus, Koch. 



6. Trenerry Wood, St. Allen, Tresidder. 



P. panormitenus, Bivona Bemardi (P. gracilis, Fries, P. Nottei, 

 Ar. Benn, JouVn. Bot., 1890, p. 300). 



Mr. W. H. Pearsall writes : " Of herbarium specimens we have 

 seen many of those labelled P. pusillus or trichodes, and all 

 those under P. pusillus var. tenuissimus, are this species/* 

 Journ. Bot., June, 1921. See also W.E.C., 7920-27, p. 148. 

 P. panormitanus is described by Hagstrom in his Critical Re- 

 searches on Potamogeton, 7976, pp. 98-103. Stipules (ligules 

 of Hagstrom) connate; gemmae (turios of H) much smaller and 

 differently formed to those of P. pusillus. 



*P. pectinatUS, Linn. var. diffuSUS, Hagstrom. 



8. Penzance, Herb. Druce, B.E.C., 7979, p. 583. 



Ruppia maritima, Linn. 



3. Salt-water pool, Par beach, 1911, Davey. 



Zannichellia palustris, Linn. 



3. Morval pond near Looe, 1913, Mrs. Sandwith. The other 

 species (Z. pedunculata) is recorded is the Flora from very 

 near the outlet from the pond. 



7. Poltesco, 1920, Downes. 



Zostera nana. Roth. 



3. Dense mass exposed at low tide on bed of Fowey river, 

 St. Winnow, Rilstone and Thurston. 



