44 CRUCIFERAE 



spreading when young. It may perhaps be scarcely distinct from the 

 following plant. 



Var. DEciPiENS, with the ripe pods arcuately divaricate. I can only 

 separate from B, arcttata, Eeichb. in Flora, v. (1822) 296, by its seeds, 

 which are similar to those of B. vulgaris, being about one and a half 

 times as long as broad, whereas in B. arcttata (of which I have examined 

 one of Reichenbach's type plants) the seeds are smaller and naiTOwer, 

 being twice as long as broad. I have not observed this shaped seed in 

 any vulgaris forms, but B. arcuata itself may not be specifically distinct. 

 Var. (lecipiens is not uncommon and is widely distributed. I have noted 

 it from Ferry Hinksey, from the Ock side near the Noah's Ark, by the 

 Genge brook near Steventon, from the Blackwater at Jouldern's Ford, 

 from the Kennet near South cote, from the Emborne side near Sandle- 

 ford, and from the Thames side at Pangbourn, Wargrave, &c. Speci- 

 mens were sent by the Author to the Bot. Exch. Club in 1893. 



Var. TKANSiENs. On dry banks and in stiff clayey fields and on barren 

 ground this occurs as a copiously branching plant, which has leaves 

 with a rather oblong terminal lobe, the lateral linear lobes much 

 exceeding in length the breadth of the terminal lobe. It forms 

 a passage to B. intermedia, to which I was inclined to refer it, but 

 the flowers are large and the beak of the fruit not very short. It has 

 been noticed near Challow in the Ock district, near Englefield in the 

 Pang, and from the neighbourhood of Newbury and Benham in the 

 Kennet district. Unnamed specimens were sent to the Bot. Exch. 

 Club in 1892. 



B. vulgaris occurs in all the bordering counties. 



[B. STKiCTA, Andrz. in Bess. Enum. PI. Volh. j2 (1822). 



This was admitted into my Flora of Oxfordshire on the authority of 

 Mr. A. French, who reported it from the banks of the Thame, near the town 

 of that name ; I have subsequently seen Mr. French's specimen, and should 

 refer it to B. vulgaris. A form of B. vulgaris which simulates B. stricta is 

 B. rivularis, Martr. Fl. du Tarn, 44 ; see Lamotte, Fl. du Plateau, 71. 



Surrey is the only coiinty boidering on Berkshire for which B. stricta is 

 recorded.] 



*B. INTERMEDIA, Borcau, Fl. du Centre Fr. ed. i, ii. 48 (1840). 



Comp. Cyb. Br. 484. Syme. E. B. i. 174, t. 123. Nyman, 31. Fl. Oxf. 23. 

 Colonist or casual. Cultivated fields. Hare. B. April-Jvme. 

 First found in Berkshire by the Author in 1892. 



3. Pang. Near Bucklebury. 



4. Kennet. Near Newbuxy in a clover-field, 1892. 



B. intermedia, which is treated as synonymous with B. vulgaris in Index 

 Kewensis, is recorded for Oxfordshire, Surrey, and Hampshire. 



*B. PEAEcox, R. Br. 1. c. American Cress. 

 Erysimum vernum, Miller, Gard. Diet. ed. 8 (1768). E.praecox, Sm. Fl. Brit, 

 ii. 707. Barbarea verna, Asch. Fl. Brand. 36 (1864). 



Syme, E. B. i. 175, t. 124. Nyman, 31. Fl. Oxf. 2^. 



