Botany. 61 



83. A. amphibia, Pet. NASTURTIUM AMPHIBIUM, which see. 



119. HESPERIS matronalis, L. 5 7, B. A garden escape. 



1. Nr. Severndroog Castle, Shooter's Hill. Dod. 



2. For years abt. on upper part of Keston Com. below the 



Mill, but now very scarce there. W.H.G. 



(38) SISYMBRIUM, L. 



120. S. thalianum, J. Gay. (ARABIS THALIANA, L.), 4 6 ; A. Dry 



waste places ; in some seasons plentiful nr. London (H. and 

 M.), but uncertain in its appearance (Sc.). 



L Hayes Common, '03. W.H.G. 



2. On a wall at Hollydale. A.D.W. 



3. Railway Arch betw. W. Wickham and Hayes, '05. 



F.M.R. 



a. First record : " In great abundance on the S. side of 

 Greenwich Park wall " (c. 1780). 



121. S. offleinale, Scop. (HEDGE MUSTARD), 6 7, A. Dry banks, 



roadsides, fields and waste places ; common indeed. 



var. b.) leiocarpum, DC. (with glabrous pods). 



1. Woolwich Ars., Crossness, Plumstead Marshes. Dod. 



123. S. sophia, L. 6 8, A. Colonist or native ; fields and road- 

 sides, esp. nr. the sea ; not com. 



1. Abbey Wood ; rubbish heap in Woolwich Ars. ; Wick- 



ham Lane ; nr. Bexley Heath ; bank nr. Crayford 

 Mill ; .Cotton Farm, Stone. Dod. 



2. Brickfield, E. Wickham, v. abt. J.F.B. and W.H.G., 



'07. 

 a. Erith (c. 1851) ; Charlton (c. 1724). 



S. orientate, L. Alien. 



1. Abt. on Ash-heaps by the Old Proof Butts, Wool- 



wich Ars. Dod. 



2. Wickham Lane Brickfields. Dod. 



125. S. Irio, L. (LONDON ROCKET). Alien. It sprang up amongst 

 the ruins of the Fire of London in 1666, and is still recorded 

 from localities nr. London. In our district it has probably 

 long been extinct. On old walls. 



S. Loeselii, Thuill, 7 8, A. A continental weed which has 

 established itself in a few places. 



1. Darenth, '98. Dr. Playfair. 



