BRITTEN : FLORA OF HIGH WYCOMBf]. 



351 



SiNAPis. Linn. Mustard, 

 S. nigra, L. " I^ot common." Bab. 28. Waste ground above the railway, 



and in the Eye, Wycombe ; in helds on the Marlow road ; by the 



Thames near Bisham, Berks. 

 S. ar vends, L. Cherlock. Bab. 28. Cornfields, but sparingly throughout 



tho; district. 



S. alba, L. Bab. 28. Fields and roadsides, very common, replacing S. 

 arvensis. 



Alyssum. Linn. 



X A. calycinum, L. Bab. 29. In two fallow fields near Little Marlow, 



extremely plentiful; equally abundant in two fields " one of clover and 



the other of rye-grass" between Cook's Hall Farm and West Wycombe. 



Note — The liower heads, when young, resemble in appearance those of a Filago. 

 Draba. Linn. Whitlow-Grass. 

 D. verna, L. Bab. 30. On walls, but more frequently in corn fields, where 



it grows to a large size, and assumes a very different appearance. 



Armoracia, Rupp. 

 X A. rusticana, Eupp. Horse Eadish. Bab. 30. Waste ground, frequent 



in most parts of the district ; well established in some places on the 



banks of the Thames. 

 A. amp)hihia, Koch. Great Yellow Cress. Bab. 31. In Wj^combe Eye, 



and abundantly by the Thames. 



Camelina. Crantz. Gold of Pleasure. 

 * C. foetida, Fr. Bab. 31. Two or three specimens in a fallow field near 



Little Marlow, with Alyssum calycinum. 



Thlaspi. Linn. Penny Cress. 

 T. arvense, L. Bab. 31. Corn fields and waste ground about Great and 



Little Marlow, frequent ; not common about Wycombe, but occurring 



occasionally on waste ground. 



Iberis. Linn. Candy-tuft. 

 /. amara, L. Bab. 32. Extremely common in cornfields throughout the 



the district, sometimes growing to a very large size. 

 [ /. umbellata, L. Has occurred in Hughenden Woods ; on waste ground 



near Little Marlow, Miss Chandler ; smd in a cornfield near North Dean, 



Dr. Bowsfead.] 



Lepidium. Linn. Pepperwort. 

 L. campestre, E. Br. Bab. 32. " I believe this occurs, in various stubble 

 fields about Loud water." MS. I have not noticed it in the district. 



