22 FLOEA OP CAMBEIDGESHIEE. 



Alyssum Linn. 



[1. A. calycinum Linn. 



Cultivated land. Not a native. A. May, June. 



1. In a field opposite to the Railway Station at Six- 

 mile-bottom, were it was first noticed in the county in 1855 

 by C. 0. B. Near Bartlow, and between Linton and Hilder- 

 sham; G-. S. G-. — 4. Gravel-pits near the Observatory.] 



Draba Linn. 



1. D. verna Linn. Whitlow-grass. 



Paronychia vulgaris, R. C. 113. Draba vulgaris caule 

 nudo Polygoni folio hirsuto, M. M. 78. B. verna, M. PI. 

 14 Relh. 260. 



Walls and dry banks, common. A. March to May. 



Probably common throughout the county, although I 

 have no station recorded in the (7) Chatteris District. 



At least two of the plants distinguished as species on 

 the continent are to be found in this county, but their 

 names and localities have not been satisfactorily determined. 



Cochlearia Linn. 

 1. C. anglica Linn. Scurvy-grass. 

 Relh. ed. ii. 253 ; ed. 3. 262. 

 Pirst found by Mr Skrimshire. 

 Salt marshes. A. May. 

 8. By the river below Wisbech. 



Armoracia Rupp. 

 [1. A. rusticana Rupp. Horse Radish. 

 Raphanus rusticanus, R. C. 132. Cochlearia, M. M. 15. 

 Cochlearia Armoracia, M. PL 15. Relh. 262. 



Waste ground near houses. Not a native. P. May. 

 1. Cambridge ! ; H. — 4. Histon. Cottenham. Magda- 

 lene College Close; Ray. — 6. Ely.] 



