250 POTAMOGETONACE^E. 



low; N. — 4. Histon road. Waterbeach Fen. West-wick 

 Field. Swavesey.— 6. Ely. Aldreth. Witchford. Stunt- 

 ney; By Sandy's Cut; N. — 7. Pit in a field between Dod- 

 dington and the wood. 



8. P. zosterifdlius Schum. 



P. compressum /3, Relh. ed. 2, 66. P. folio quam in P. 

 compresso latiora, longiora (sic), Relh. ed. 3, 69. P. zosteri- 

 fdlius, New Bot. Guide, 153. 



Rivers and streams. P. June. 



3. Queens' Ditch, and River Cam at Sheep's Green, 

 Cambridge. — 5. Baitsbite. — 6. Ely. 



[P. graminews (Linn.) is said by Relhan to have been 

 found in Cow Fen. Was not this P. zosterifdlius which 

 grows close to that place ?] 



9. P. COmpr&SUS Linn. 



P. ramosum caule compresso, folio graminis ccmini, 

 nondum descriptum,' ~R,. C. 124. M. M. 16. P. compressum, 

 M. PL 4. Relh. 69. 



Ditches. P. June, July. 



1. Cam, near Cambridge; Ray. — 4. On the way to the 

 ferry, and by Middle Hill Drove, Waterbeach. — 5. Reche 

 Lode. 



10. P. pusfllus Linn. 



P. pusillum gramineo folio, caule rotundo, nondum de- 

 seriptum, R. C. 127. M. M. 16. P. pusillum, M. PL 4. 

 Relh. 69. 



Ponds and ditches. P. June. 



1. Hinton Moor; Relh. — 2. Shepreth. Sawston; G. S. G. 

 — 3. Gamlingay. Malton; N — 4. Waterbeach.' — 5. Bot- 

 tisham, Snailwell, and Wicken Fens. Near Paper Mills, 

 Cambridge; J. F.— 6. Ely!; H. 



