Onap. III, FUMARIACE. 12] 
spines, it is surprising that it should be provided with 
tendrils, comparatively inefficient though these are. 
The plant might have been left, one would have 
thought, to climb by the aid of its spines alone, like 
our brambles. As, however, it belongs to a genus, 
some of the species of which are furnished with much 
longer tendrils, we may suspect that it possesses these 
organs solely from being descended from progenitors 
more highly organized in this respect. 
Fumariace&.—Oorydalis claviculata.—According to 
Mohl (p. 48), the extremities of the branched stem, 
as well as the leaves, are converted into tendrils. 
In the specimens examined by me all the tendrils were 
certainly foliar, and it is hardly credible that the same 
plant should produce tendrils of a widely different 
homological nature. Nevertheless, from this state- 
ment by Mobl, I have ranked this species amongst the 
tendril-bearers; if classed exclusively by its foliar 
tendrils, it would be doubtful whether it ought not to 
have been placed amongst the leaf-climbers, with its 
allies, Fumaria and Adlumia. A large majority of its 
so-called tendrils still bear leaflets, though excessively 
reduced in size; but some few of them may properly 
be designated as tendrils, far they are completely 
destitute of lamine or blades. Consequently, we here 
behold a plant in an actual state of transition from a leaf- 
climber to a tendril-bearer. Whilst the plant is rather 
young, only the outer leaves, but when full-grown all 
the leaves, have their extremities converted into more 
or less perfect tendrils. I have examined specimens 
