98 



lines wide and the floating leaves are verj seldom produced. Hull. 

 Aylnier, Meech's Lake. 



var. LON^iPEDUNCULATlls. (Merat) Morong. 



Submersed leaves 12 inches long and 2 3 lines wide sharp pointed. 

 Internodes very long. Peduncles 3 6 inches long. Floating 

 leaves ovate. Teuipleton. (W.Scott.) Meech's Lake. Kingsmere. 



var. MAXIMUS, Morong. 



''All parts greatly elongated. Floating leaves often lanceolate and 

 sharply pointed. 3 4 inches long and li 14 lines wide. Sub- 

 mersed leaves 2 6h inches long and 3 8 lines wide, 5 9 

 nerved." (Morong.~) Specimens collected at Kettle Island were 

 placed here by Mr. Morong. 



2438. P. lucens, L. 



Meech's Lake. This is the only actual record I have of this species. 

 Leaves shining green, all submersed, short-petioled, oval or lan- 

 ceolate, mucronate. Fruit roundish, compressed with obtuse 

 margins, slightly keeled. 



2439. P. angustifolius, Berch and Presl. 

 P. Zizt'i, Mertens and Koch. 



Meech's Lake. Templeton. This resembles lucens in the green 

 shining leaves ; but is slenderer and has emerged floating leaves 

 with petioles a little shorter than the blade. 



2441. P. PERPOLIATUS, L. 



Green's Creek. (Dr. II B. Small.*) Kettle Island. (J. F.) 

 McLaurin's Bay, East Templeton. (W. Scott.) The type has 

 orbicular ovate or shortly lanceolate leaves and short peduncles. It 

 is decidedly rare at Ottawa 



var. Richardsonii, A. Bennett (MS). 



/'. perfoliatus, L. var. lanceolatus, Bobbins. 



This is the common form at Ottawa ; it has loni;- lanceolate acumi- 

 nate leaves, sometimes over 4 inches in length and the lone 

 peduncles are distinctly thickened upwards. (B.) 



2442. P. zosterifolius, Schuin. 

 1'. compressus, Fries. 



Common. Stems flattened and winged Leaves grass-like, abruptly 

 pointed. (B.) 



