REPORT FOR 1913 



451 



Sisymbrium pannonicum Jacq. A dwarf form abundant on 

 sand dunes near Blundellsands, S. Lanes (59). July 10, 1913.— 

 J. A. Wheldon. "Yes, a starved form of S. altissimum L." — G. C. 

 Druce. 



Sisymbrium Loeselii L. Waste Heap, N. of Welwyn Tunnel, 

 Herts, v.-c. 20, June 16, 1913. Will probably disappear, as the waste 

 heap is again brought into cultivation. Not recorded in Pryor's 

 Flora of Herts. S. pauiioiiicum Jacq. in same place, and near St 

 Ippolyts by roadside. Will perhaps spread. — J. E. Little. "Yes." 

 — G. C. Druce and A. Thellung. 



Sisymbrium officinale L., var. leiocarpum DC. [Ref. No. 1053.] 

 Knaphill, Surrey, July 20, 1913. On the Bagshot Sands 

 about Knaphill and Bisley this variety seems to be the 

 only form of the species, but it is by no means restricted to 

 light sandy soils, and occurs elsewhere in Surrey on the London Clay 

 and Chalk. Though ranked as a variety in Lo7id. Cat., it probably 

 merits a higher status. — C. E. Britton. " Yes, good examples of the 

 var. leiocarpum.'^ — G. C. Druce. ''I have seen this variety on the 

 London Clay about Wembley, Middlesex, where it seemed to be 

 commoner than the type." — Ed. " Good var. leiocarpum. This 

 variety is much commoner in America than true S. officinale, which is 

 known nearly throughout the range of tlie variety, but only scattcr- 

 ingly. The true S. officiiiale has the stem and leaves densely 

 pubescent with the same short spreading hairs as the pods, while in 

 var. leiocarpum these parts are glabrous or sparsely bristly." — S. F. 

 Blake. 



Brassica Cheiranthus Vill. [Ref. No. 4993.] Railway bank near 

 Yarn ton, Oxon, September 1912. A new county record, but an 

 alien. Dr Thellung names it B. monensis Huds., with which I gather 

 he thinks it is synonymous. Syme {Eng. Bot. i., 138) makes one a sub- 

 species of the other. They seem distinct to me. — G. C. Druce. 

 Also from Corbiere Station, Jersey, June 9, 1913. — A. Webster. 



Brassica — — ^ Waste ground by Maltings, Hythe Quay, Colchester, 

 June 1913. One very large plant only ; leaves glaucous. Despite all 

 precautions the leaves dried a very bad colour. — G. C. Brown. 

 " This is Raphanus sativus L." — G. C. Druce and A. Thellung. 



Brassica elo7igata Ehrh. On railway ballast at Cavendish Dock, 

 Barrow-in-Furness; and at Lindal Bank, Aug. 27 and 29, 1913, both 

 stations in Lake Lancashire, v.-c. 69. — Coll. W. H. Pearsall, 

 Dalton-in-Furness. This name was suggested by Mr G. C. Druce ; it 

 corresponds with plants so named in my herbarium, from Rouen, 

 Kiel, Anhalt, Saxony, Bohemia, Hungary, Transsylvania, Trieste, 



