CRUCIFER®. 123 
equal in length to the last bead or segment of the pod; but 
although it is variable in length, I have seldom seen it so short as 
this. The beak itself is more subuiate and less compressed than 
in R. Raphanistrum, and the colour of the whole plant is a deeper 
green. 
Mr. Hewett C. Watson finds this plant retains all its characters 
in cultivation. He believes R. maritimus to be truly native, and 
the preceding to be merely an introduced colonist. 
Sea Charlock, or Sea Radish. 
Section IT.—SILIQUOS &. 
Fruit a siliqua, usually more than four times as long as broad, 
sub-cylindrical or linear (except in some of the species of Nastur- 
tium), not divided by transverse partitions, opening when ripe by 
two valves, which split away from the replum. 
Trips ITV.—BRASSICE. 
Cotyledons longitudinally folded (conduplicate). Pod elongate, 
2-valved. 
GENUS IV.—BRASSICA. Bois. 
Sepals erect or spreading, with lateral ones sometimes gibbous 
at the base. Petals equal or entire, with the claw usually about 
equal to the limb. Filaments without wings or teeth. Pod sub- 
cylindrical, often more or less compressed, parallel to the partition. 
Style persistent, forming a conical, subulate, ensiform, or ovoid 
beak. Seeds globose or ovoid. 
I follow Mr. Bentham, who in his “ Handbook” adopts M. 
Boissier’s views in uniting Diplotaxis with Brassica (as it is limited 
in the “Genera Plantarum”). The separation between the two 
appears to be merely artificial. 
The generic name is derived from an old Celtic word bresic, a cabbage. Varro 
derives the name from the Latin preseco, to cut off, because it is cut from the stalk. 
Sus-Genus I.—SINAPIS. Linn. 
Sepals spreading, glabrous. Seeds sub-globular, arranged in a 
single row down the middle of each cell of the pod. 
The name of the genus Sinapis comes from suum (sirapi). The Celtic word 
nap is a designation applied to all plants resembling a turnip or cabbage. 
