CRUCIFERZ. 141 
long as the sepals, roundish, abruptly contracted into a narrow 
claw. Style not narrowed towards the base. 
Var. a, genuina. 
Stem naked, or with 1 or 2 leaves near the base. Root always 
annual. 
Var. 2, Babingtonii. 
Stem leafy, sometimes slightly woody at the base. Root occa- 
sionally biennial or even perennial ? 
On roadsides and sandy waste places. Common in the South of 
England. In Scotland it is confined to the neighbourhood of the 
ballast hills at Charlestown in Fifeshire. 
England, [Scotland,| Ireland. Annual, Biennial, or Perennial ? 
Summer. Autumn. 
Stem subdividing into several close to the ground, at which 
point the leaves are crowded together, very few being situated on 
the stems above the place where the latter separate, in variety a ; 
in variety &, however, where the branching is not confined to the 
base, the stems are often leafy for 6 or 8 inches of their length 
in luxuriant specimens. Leaves pinnatifid, but with the segments 
shorter, more triangular, and closer together than in B. tenuifolia, 
and with the lobes more often irregularly toothed; the terminal 
segment is also usually larger than in that species, so that some- 
times the leaves become imperfectly lyrate. The flowers are rather 
smaller, and the sepals oblong, generally with a few hairs towards 
the tip. The peduncles are always shorter than the pods, which 
are more spreading than in B. tenuifolia. 
The variety 6, which is noticed by Professor Babington (Man. 
ed. v. p. 29), closely resembles B. tenuifolia in habit, and I have 
seen specimens of it to which that name had been affixed; but the 
much shorter pedicels form a character by which they may be 
readily separated. The stem too is more hispid towards the base. 
The leaves in B. muralis are very frequently sinuated, that is, they 
appear to have portions scolloped out, while in B. muralis the 
lobes generally project beyond the general outline of the leaf, but 
this is by no means always the case. Varieties a and 6 appear to 
pass too gradually into each other to allow me to consider them 
as sub-species. 
Wali or Sand Mustard. 
French, Diplotaxe des Mura, 
