ENATION. 4AD 
place an anomalous development which occurs occasion- 
ally in Ruscus aculeatus, and in which, from the upper 
surface of the ordinary flattened leaf-hke branch, pro- 
jects at right angles a second similar branch, so that 
in section the appearance would be like that of the in- 
verted letter t; thus, J. 
Enation from foliar organs—Leaves—'l'he development of 
adventitious lobes from leaves may take place either 
from their surfaces or their margins. A few illustrations 
may be given of each. In cabbage leaves a formation 
of adventitious lamine projecting at right angles from 
the primary one may frequently be observed. In the 
instance figured (fig. 210) the new growths proceeded 

Fic. 210..—Section through base of midrib of cabbage leaf, showing . 
supplementary lamine, Xe. 
almost exclusively from the thick midrib, which, in the 
figure, is shown cut through just above the base. Not 
only is the ordinary semilunar band. of vascular tissue 
to be here seen, but a similar broken line of vessels 
exists on the upper side of the leaf-stalk; thus the 
whole structure resembles that of a stem or a branch 
as much as that of a true leaf. 
The development of secondary leaves from the sur- 
faces of primary ones (phyllomania, autophyllogeny) 
has already been alluded to at p. 355, 
