A STUDY OP BARBAREA VULGARIS R. BR. 203 



sparingly in the neighbourhood of Weimar and Gotha. He dis- 

 tinguishes it by its flowers, twice as large as those of B. vulgaris, 

 by its patent branches, arcuate pods, and the form of its leaves. 

 He had previously seen it in a garden under the name Erysimum 

 Barbarea, fl. ijleno, but had regarded it as possibly a garden state. 

 He cites Sturm, Deutsclilands Flora, Heft 43, t. 10, as represent- 

 ing B. arcuata. He says his plant is Wahlenberg's Erysimum 

 Barbarea ^, by which he must refer to Wahl. Fl. Ups. 226 (1820), 

 where the plant is thus described : " /3 Caule ramosiore, siliquis 

 patentibus longioribus. E. Barbarea, Smith, brit. p. 706. Sv. 

 Bot. t. 194. Flor. Dan. t. 985." 



Fries, however, in 1828 (Nov. Fl. Suec. 205) considered Wahlen- 

 berg's 13, including the figures cited, to be not arcuata but a plant 

 intermediate between his var. a silvestris— which has "siliquis 

 brevioribus adpressis strictis " — and arcuata. He gives the name 

 camjjestris to this intermediate form, altering Wahlenberg's 

 " siliquis patentibus " to " oblique erectis, subpatentibus." Eeichen- 

 bach therefore, from the description in Fl. Ups. might well think 

 Wahlenberg meant his B. arcuata, and indeed Wahlenberg may 

 have included it, for in his Fl. Suec. 417 (1824), he gives Keichen- 

 bach's name as a synonym under his var. [3. 



It seems remarkable that Fries, writing in 1828, should cite 

 B. arcuata Eeich. in Sturm for his var. y, for Keichenbach in 

 1832 (Fl. Germ. Excurs. 683) writes " Echb. Primit. 1820 nee 

 apud Sturm." I consider this due to the fact that the figure in 

 Sturm matches those cited by Fries for his var. campestris, which 

 show the pedicels of the young pods arcuate ascending, whereas 

 Eeichenbach's description has " Schoten jung mit den Stiele 

 abstehend bogen formig aufsteigend, . . ." This agrees with 

 Fries's var. y and disagrees with the figure in Sturm. Hence it 

 w^as probably the figure which Eeichenbach was repudiating. 

 " Primit. 1820 " would appear from Sturm to be Primit. Sem. 

 hort. Dresd,, which I have been unable to see. Fries's reference 

 to M. Bieberstein is to the latter's Erysimum Barbarea, which 

 De Candolle cites for his B. taurica. 



By Grenier and Godron (Fl. France i, 91, 1848) both B. vul- 

 garis and B. arcuata are regarded as good species, B. arcuata 

 being distinguished as follows : 



" Fleurs plus grandes, d'un jaune plus vif, en grappes plus 

 Uches ; p^doncules, fructif^res plus 6cartes, plus longs, droits, de 

 moiti6 moins 6pais k la maturity etales a angle droit ; siliques 

 jeunes arquees-ascendantes, a la fin 6tal6es de tons cotes, longues de 

 30-40 millm., de moitie moins epaisses, un peu comprim^es, toru- 

 leuses ; style plus mince et plus long ; graines plus petites, plus 

 ovales, plus noires : feuilles a lobes plus profondement incis6s- 

 crenel6s a cr^nelures plus etroites et moins arrondies." 



Subsequently Martrin-Donos (Fl. Tarn, 44, 1864) described a 

 B. rivularis as follow^s : 



" Plante de 3-5 decimetres ; rameaux fructif^res courts, atteign- 

 ant tous a peu pr6s la meme hauteur ; siliques obliqueinent 

 dressees le long des rameaux, et le plus souvent dispos6es d'un 



