BRASSICA 59 



permanent in its localities, but I have found it in many places in all the 

 districts. 



Var. Rutabaga (DC. Syst. ii. 589 as a var, of B. campesfris, Linn.). Swede 

 Turnip. 



Casual, only the remains of cultivation ; frequently to be seen in arable 

 fields after a crop of ' Swedes ' of the preceding season. The blossoms are of 

 a beautiful yellow colour, and the peduncles of the unopened inflorescence 

 have to me a distinctly pleasant taste. 



B. Napiis occurs in all the bordering counties. 



B. Rapa, Linn. Sp, PI. 666(1753). Naveic. 



B. campestris, Index Kewensis. 



Comp. Cyb. Br. 485. Syme, E. B. i. 135, t. 90. Nyman, 46. Fl. Oxf.31. 

 Native or denizen. River and brook-sides. Locally common. B. orP. 



April-August. 

 First record. B. campestris abundant by the Thames, Mr. G. G. Mill in 



Phyt. i. 984, 1843. 



Var. svLVESTRis, H. C. "Watson, Lond. Cat. ed. 7, 2 (1877). 



1. Isis. By the side of the Cole near Coleshill and near Lechlade, 



and by the Thames between Faringdon and Oxford not un- 

 frequently. 



2. Ock. By the Ock near Abingdon, and plentifully by the Thames 



between Sandford and Moulsford. 



3. Pang. Abundantly between Moulsford and Reading on the 



banks of the Thames, affording a brilliant mass of colour. 



4. Kennet. By the Kennet near Newbury and Thatcham. Abun- 



dant by the Thames at Bisham, Cookham, &c., Britt. Contr. 



5. Loddon. Near Sandford Mill on the Loddon and plentifully by 



the Thames from Sonning to Maidenhead. 



Var. SATivA, H. C. Watson, Lond. Cat. I.e., is frequently seen in 

 arable fields as the remains of cultivation. 



Var. BRiGGsn, H. C. Watson, Lond. Cat. 1. c, and in Briggs, Fl. 

 Plymouth, 20 (1880). This variety appears to be only an annual 

 form which occurs in cultivated fields and waste places. In Bei'k- 

 shire it has been noticed about Didcot. 



B. Rapa is found in all the bordering counties. 



B. sinapioides, Roth. Man. ii. 957 (1830). Black Mustard. 



B. nigra, Koch, in Roehl, Deutschl, Fl. ed. 3, iv. 713 ^1833). Sinapis 

 nigra, Linn. Sp. PL 668 (1753). 



Top. Bot. 49. Syme, E. B. i. 126, t. 85. Nyman, 47. Baxt. t. 336. 



Fl. Oxf. 31. 

 Native. Viatical. Waysides, fields, river-banks, &e. Not uncommon. 



A, or B. May- September. 

 First record. Sinapis nigra. Common Mustard, Dr. Noehden, in 



flavor's Agr. Berks, 1809. 



