246 ARACE.E. 



Very wet places. P. June. 



3. In a ditch by Great Founder's Closes near House-in- 

 the-fields, Cambridge; Belh. — 4. On the 'wash, of the Cam, 

 half a mile below Waterbeach. Marsh by the river at Ches- 

 terton. By the river nearly opposite Fen Ditton ; W. H. C. 

 On the river-bank in Chesterton parish, opposite to the 

 Barnwell Gas Works ; H. Planted in a ditch by Dove-House 

 Close near Jesus College by Mr Dent (Lyons) or Dr Heberden 

 (T. M.). — 5. Wash of river above Upware. — 6. River-bank 

 below Barraway. 



A'eum Linn. 

 1. A. maculatum Linn. Wake-Robin. Cuckoo-pint. 



Arum, R. C. 16. A. officinarum, M. M. 63. A. macu- 

 latum, M. PL 20. Belli. 394. 



Hedge-banks and copses. P. April, May. 



Common in the (1) Cambridge, (2) Boyston, (3) Wim- 

 pole, and (4) Cottenham Districts. — 5. Horningsey. Up- 

 ware. — 6. Witchford. — 7. Doddington. — 8. Wisbech; J. B. 



L^mna Linn. 

 1. L. trisulca Linn. Water Ivy. 



Hederula aquatica, R. C. 72. Lenticula aquatica trisulea, 

 M. M. 10. L. trisulca, M. PI. 21. Belh. 374. 



In stagnant water. A. June. 



1. Shudy Camps. — 2. Triplow. — 3. Cow Fen, Cambridge. 

 Comberton. Eltisley. Croydon. — 4. Pits near the Obser- 

 vatory. Baitsbite. Dry Drayton. Waterbeach Pen. — 

 5. Horningsey. Wicken Fen. — 6. Ely. Aldreth. Witchford. 

 — 7. Doddington. — 8. Newton. 



2. L. minor Linn. Duckweed. 



Lens palustris, B. C. 86. Lenticula palustris vulgaris, 

 M. M. 10. L. minor,,M.. PI. 21. Belh. 374. 



