AMONG THE WILD FLOWERS. 29 
example. The stamens are six in number, of 
which the four larger are in the centre, and 
two shorter ones on either side. This char- 
acter of the CRuCIFER#, is also the mark of 
the Linn. Class XV., Zetradynamta, which 
name refers to the four longer stamens as 
superior. . 
In Cl. XIV., which may best be studied by 
comparison with the structure just described, 
there are two pairs of stamens, one pair ap- 
pearing above the other; this class is named 
Didynamia as having two superior stamens. 
These didynamous plants are distributed 
among several Natural Orders; but many of 
them belong to Nat. Ord. Lasiat#, whose 
flowers have a projecting lip, /aéza, in front. 
Two examples of this Class and Order are at 
this time abundant, the White Dead-nettle, 
Lamium album, and the Purple Species, Z. 
purpureum. In these very common plants, the 
colour of the Anthers, black and yellow in the 
one, orange in the other, is very fine, especially 
when seen through a lens. The Dead-nettle 
genus, Lamzum, not only differs from the 
stinging Nettle by the absence of the poison- 
ous hairs of the latter, but in every other 
