om 
36 THE CRUCIFER FAMILY. [ Beasaele 
is not so distinct, the persistent style is more conical at the base than 
in Barbarea, and very much longer than in Sisymbriwm. 
Upper stem-leaves entire, sessile, or clasping the stem. 
All the leaves elabrous and glaucous, the upper ones not 
auricled . 4. B. oleracea. 
Radical leaves more or Jess hispid, the upper ones auricled at 
the base . ; : . 5. B. campestris. 
All the leaves pinnately cut or stalked. 
Sia or fewer seeds in each cell of the pod. 
Pods slender and short, closely pressed against the axis of 
the raceme. Beak small. 
Pods ending in a slender style, slightly conical at the base 8. B. nigra. 
Pods ending in a distinct beak, thickened at the base . . 9. B. adpressa. 
Pods more or less spreading in a loose raceme. Beak large. 
Pod very hispid, rather shorter than the long flat beak — . 6. B. alba. 
Pod glabrous, or rough, rather longer than the conical beak 7. B. Sinapis. 
Ten, twelve, or more seeds in each cell of the pod. 
Pod 14 to 2 inches, the beak distinct, with 1 or 2 seeds . 3. B. monensis. 
Pod slender, not re. inch long. The beak very short, with- 
out seeds. 
Branched and leafy perennial, afoot high ormore . . iL. B. tenwifolia. 
Low annual, the leaves mostly radical . ; , : . 2 B. muralis. 
Besides the above, a variety of B. Lrucastrum, Vill., a common roadside 
weed in some parts of continental Europe, has been found near Saffron 
Walden, and is said to have sown itself in the neighbourhood, but can 
scarcely claim as yet to be admitted in our Floras. It is an erect 
annual, with the habit and pinnatifid or pinnate leaves nearly of B. 
monensis, but the pod has a very short seedless beak. 
1. B. tenuifolia, Boiss. (fig. 76). Wall B., Rocket.—A loosely branched 
or bushy perennial, 1 to 2 feet high, perfectly glabrous and somewhat 
glaucous, emitting a disagreeable smell when rubbed. Leaves very 
variable, mostly irregularly pinnate, 2 to 4 or 5 inches long, with a few 
lanceolate or oblong, entire or coarsely toothed segments, the upper 
leaves often entire or nearly so. Flowers rather large, lemon-coloured. 
Pods in a loose raceme, about 14 inches long, slender, spreading, with 
numerous small seeds distinctly arranged in two rows. Diplotaxis 
tenutfolia, D.C. 
On old walls, ruins, and waste places, in central and southern Europe 
to the Caucasus, extending northwards to southern Sweden. In 
Britain chiefly in southern England. /l. the whole summer. 
2. B. muralis, Boiss. (fig. 77). Sand B.—An annual, branching 
from the base, usually about 6 inches high, with the same smell as the 
last. Leaves mostly radical, or crowded at the base of the stems, less 
deeply divided than in B. fenmafolia, and often only sinuate. Flowers 
much smaller, the pods and seeds similar, but also smaller. B. brevipes, 
Syme. Diplotaxis muralis, D.C. 
In fields, cultivated and waste places, very common in southern and 
scattered over central Europe. In Britain abundant in some of the 
southern counties of England, and near Portmarnock, in Ireland, and 
appearing occasionally further north, especially near the sea. I. all 
summer. [Var. Babingtonti, Syme, is a biennial or perennial variety. ] 
3. B. monensis, Huds. (fig. 78). Jsle of Man B.—Hither an annual 
or forming a stock of longer duration, glabrous, or bearing a few stiff 
hairs at its base. Stems sometimes barely 6 inches high, with the 
leaves mostly radical, sometimes loosely branched, above a foot high, 
