A STUDY OF BARBAREA VULGARIS R. BR. 207 



S. Devon. Exmouth, 1916. E. W. Hunnyhun. — Dorset. 

 Corfe Castle, June, 1852. Borrer (Herb. Boruor). — N. Hants. 

 Between Odihani and Winchfield Station, 1891. C. E. Palmer. 

 — W. Kent. Borders of fields near Beckenham, 1892. E. de 

 Crespigny. — Surrey. Battersea, 1851. Gbalk-pit near Dorking, 

 1916. A. J. Wilmott. — Middlesex. Cultivated field between 

 Isleworth and Twickenbam, 1916. — Herts. Wellen and Hatfield, 

 1875. T. B. Bloio. Purwell, Hitcbin, 1915. J. E. Little.— N. E. 

 Yorks. Cbfton Ings, June, 1852. J. G. Baker (Herb. Watson). 



Ireland. Eoadside, Lougbbrickland, Co. Down, 1891. H. W. 

 Lett. Cottage yard, canal side, Straffan, Co. Kildare, 1905. 



Tbe British examples wbicb I bave placed under tbis variety 

 are not so extreme as Billot's No. 3011, and vary somewbat in 

 tbe direction of var. campestris Fr. 



VAR. CAMPESTRIS Fr. Nov. Fl. Suec. 205 (1828). B. sylvestris 

 Jord., Diag. 100 (1861) ; B. vulgaris sub-sp. eu-vulgaris Syme, 1. c. 

 partim ; B. vulgaris R. Br. race vulgaris Rouy & Fouc, Fl. Fr. i, 

 197 (1893). 



Icones. Sturm, Deutscb. Fl. beft 13, t. 10 (1823) {B. arcuata) ; 

 Fl. Dan. t. 985 (1792) {Erysimum Barharea) ; Reicb. 1. 1356 (1837) 

 (B. vulgaris) ; Svensk. Bot. iii, 1. 191 (1801) {E. Barharea) ; Dietricb. 

 Fl. Boruss. vi, t. 421 (1838) [B. vulgaris) ; Zenker Fl. Tburingen, t. 

 1215 {B. vulgaris). 



Exsiccata. Reicbb., 678 {B. vulgaris) ; Billot, 2213 (B. vulgaris). 



Plant robust, pods usually longer, up to 25 mm., obliquely 

 erect or sligbtly spreading. 



Tbis is tbe form most frequently met witb in Britain and 

 appears to be equally common on tbe Continent. It is connected 

 by intermediates witb var. silvestris on tbe one band and witb 

 var. arcuata on tbe otber. According to Fries it is tbe plant 

 always figured by tbe old berbalists. It is tbe B. vulgaris of 

 De Candolle's Syst. ii,-206, wbere very full references to the early 

 authors are given. 



Var. ARCUATA Fr. Nov. Fl. Suec. 205 (1828) ; Neilr. Fl. N. Ost. 

 730 (1859) ; Erysimum arcuatum J. & C. Presl. Fl. Cecb. 138 

 (1819) ; B. taurica D.C. Syst. 2, p. 207 (1821) ; B. arcuata 

 Reicbb. in Flora v, 296 (1822) ; B. vulgaris subsp. arcuata Syme, 

 Eng. Bot. ed. 3, 172 (1863) ; B. vulgaris race arcuata, Rouy & 

 Fouc, Fl. Fr. i, 198 (1893) ; B. vulgaris forma divaricata Trimen 

 & Dyer, Fl. Middx. 29 (1866) ; B. vulgaris var. decipiens Druce, 

 Fl. Berks. 11 (1897). 



Icones. Syme Eng. Bot. i, t. 121 (1863) (not typical ; pods 

 too short and representing more nearly the var. hracliycarpa 

 R. & F.) ; Reicbb. t. 4357 (1837) ; Zenker Fl. Tburingen, t. 1211. 



Exsiccata. Reicbb. 1963 ! Billot 3315. 



Intiorescence often laxer. Pedicels patent. Pods, arcuate 

 ascending, spreading at right angles to tbe axis, or even deflexed. 



Sub- var. hrachycarpa mibi. B. vulgaris race arcuata ft 

 hrachycarpa R. & F. loc. cit. Pods short, valves often only about 

 twice as long as tbe pedicel, and twice as long as the style ; often 

 partly sterile. 



