252 POTAlfOGETONACEiE. 



Zannich^llia Linn. 

 1. Z. pallistris Linn. Horned Pond-weed. 



Potamogeito affine gramen aquaticum, R. C. 125. 'Apo- 

 nogeton aquaticum graminifolium staminibus singularibus, 

 M. M. 13. Z. palustris, M. PI. 21. Relh. 373. 



Stagnant water. P. May to August. 



Generally distributed throughout the county, but not 

 very abundant, although perhaps often overlooked. 



CTPJEPAGUM 



Schointjs Linn. 



1. S. nigricans Linn. Bog Bush. 



Juncus palustris panicula glomerata ex rubro nigricante, 

 E. C. 81. Scirpus palustris capitulo nigricante semine splen- 

 dente, M. M. 111. S. nigricans, M. PI. 2. Relh. 20. 



Peaty moors and fens. P. June. 



1. By the brook, Pulbourn. Teversham and Shelford 

 Moors; Side of road to Hinton; W. H. C. — 2. Melbourn 

 Common. Peat-holes, Tripkw. Sawston Moor. — 3. Gam- 

 lingay. — 4. Pits near the Observatory. — 5. Quy, Bottisham, 

 Wicken, and Horningsey Fens. 



Cladium Pat. Br. 

 1. C. Mariscus K Br. Common Sedge. 



Gyperus longus inodorus sylvestris, P. C. 43. Pseudo- 

 Cyperus palustris foliis et carina serratis, M. M. 110. 

 Schcenus Mariscus, M. PL 2. Eelh. 20. 



Peaty moors and fens. P. July. 



1. Wilbraham Fen. By the Quy Water. Fulbourn and 

 Teversham Moors; S. "W". W. Hinton Moor; Ray. — 



