CEUCIFERiE. 



57 



1. Common Sisymbrium. Sisymbrium officinale, Scop. 

 (Eng. Bot. t. 735. Sedge Mustard.) 



An erect annual, more or less downy, 

 a foot high or rather more, with very 

 rigid, spreading branches. Leaves 

 deeply pinnatifid, with few lanceolate, 

 slightly toothed lobes, the terminal one 

 from 1 to 1| inches long, the others 

 smaller, often curved backwards towards 

 the stem ; the upper leaves sometimes 

 undivided and hastate. Flowers very 

 small and yellow. Pods about 6 lines 

 long, thick at the base, tapering to the 

 point, more or less hairy, almost sessile, 

 and closely pressed against the axis, in 

 long, slender racemes, the midribs of the 

 valves almost as prominent 8L$inJErysimum. 



In waste places, and by roadsides, 

 common throughout Europe and Russian 

 Asia, except the extreme north. Abun- 

 dant in Britain, excepting the northern 

 extremity of Scotland. Fl. summer. 



(F.68.) 



Fig, 68. 



2. Broad Sisymbrium. Sisymbrium Irio, Linn. (Fig. 69.) 



(Eng. Bot. t. 1631. London Rocket.) 

 An erect annual, with a hard stem, a 

 foot high or more, and glabrous or nearly 

 so. Leaves deeply pinnatifid or pinnate, 

 the lobes or segments lanceolate, more 

 numerous and larger than in the common 

 S. Flowers small and yellow. Pods on 

 more or less spreading pedicels, 1\ to 2 

 inches long, often all turned to one side, 

 forming a dense, erect raceme. 



In waste places, and by roadsides, in 

 central and southern Europe to the 

 Caucasus. Rare in Britain, and chiefly 

 recorded from the neighbourhood of 

 London, Berwick, Dublin, and some 

 other towns. Fl. summer. 



VOL. i. 



