265 
WILD NAVEW. 
By T. R. Arcuer Bnurocs, F.L.S. 
I have recently met with a Brassica coming under the B. polymorpha 
of Eng. Bot. ed ing : si fi 
o 
Watson, in Journ. Bot., vol. VII. pp. 346-50 ; vol. VIII. pp. 369-72. 
Before proceeding further, it will be well for me to say that this Bras- 
leaves grass-green in colour, conspicuously unlike the glaucous ones of 
the flowering stem. ; 
It agrees very well with B. campestris, L., as described in Eng. Bot., 
ed. 3, “ leaves all glaucous, the radical ones hispid, the rest glabrous ; 
flowers falling off before the corymb lengthens into a raceme ;" but ifthis 
"er me 
entirely glabrous, though sometimes almost so, whilst at others it is 
decidedly hispid. Neither can it be put under B. Rapa, L., inasmuc 
as it has not grass-green radical leaves. If, however, the form similar to 
the Thames-side plant could be placed uuder this last, then might this 
Torpoint one be assigned to B. campestris, L., and the difficulty as to its 
position would be at an end. 
any of my examples are without the lowest leaves, as these had mostly 
rotted away before I first noticed it in June last, but some have them suffi- 
rather than with the turnip, and furnis ing a go 
between it and the two other plants of the neighbourhood referred to 
above. In both the fields but few specimens had escaped the labourer s 
hoe out of the lines of potatoes, and probably the banking up of the 
earth around the stalks of the crop hastened the decay of the lower 
leaves. 
The fact of its growing with potatoes prc A age 
come into bloom after springing up, especially as 
pods on some of the oes in the Cat week in Juue showed that they 
had then been in flower for some time. oe 
Lam inclined to think that it is established as a “ colonist” in the 
locality named, since, besides finding it in the two fields, I eather a 
Single specimen near the village of Antony, between one and i 
distant from them. As regards it and the two other forms of B. m J- 
morpha of Syme occurring about Plymouth, it is quite clear that neither 
proves how quickly it must have 
as the size of the seed- 
