FLOEA OF CAMBRIDGESHIRE. 17 



By ditches and streams. B. 1 May to August. 



Common, although apparently less so in the Fens, where 

 I have but few stations recorded, and none in the (7) Chat- 

 teris District. 



A'rabis Linn. 



1. A. hirsiitaB. Br. 



Turritis hirsuta, M. PL 15. Lyons, 42. Eelh. 271. 



First found by Prof. J. Martyn. 



"Walls and dry banks; also on the black soil in the Fens. 

 B. June to August. 



1. Dale Moor near Sawston ; H. Roadside just beyond the 

 turnpike at Bourn Bridge; J. M. — 5. In Quy and Bottisham 

 Fens. On the Park-wall at Chippenham. Walls at the Red 

 Lion Inn, Newmarket; Relh. — 8. River-bank at Wisbech; 

 A. P. — The plant of the Fens is the A. sagittata of De Can- 

 dolle and the French authors. 



*2. A. Turrita Linn. 



M. PI. 15. Lyons, 42. Eelh. 270. 



Introduced since the time of Eay. First noticed by 

 Prof. T. Martyn in 1763. 



Walls. B. May. 



1. Old walls about Trinity and St John's Colleges, less 

 abundant now than formerly, owing to recent repairs. — 

 3. Lately established near the brook in the walks of St John's 

 College. 



[Eay records Turritis (Cat. 172) as "found where flax 

 did grow near Cambridge ; " but adds that he had never found 

 it. It is the Turritis glabra of Linnaeus, and is probably not 

 a native of this county.] 



Cakdamine Linn. 



1. C. hirsiita Linn. 

 Eelh. ed. ii. 255; ed. iii. 264. 



2—3 



