Cuar. XVL] PINGUICULA LUSITANICA. 315 
a few grains of pollen on a single gland causes it to secrete 
copiously. We have also seen how frequently the small 
leaves of Erica tetralix and of other plants, as well as various 
kinds of seeds and fruits, epecially of Carex, adhere to the 
leaves. One leaf of the Pinguicula had caught ten of the 
little leaves of the Erica; and three leaves on the same 
plant had each caught a seed. Seeds subjected to the action 
of the secretion are sometimes killed, or the seedlings injured. 
We may therefore conclude that Pinguicula vulgaris, with its 
small roots, is not only supported to a large extent by the 
extraordinary number of insects which it habitually captures, 
but likewise draws some nourishment from the pollen, leaves, 
and seeds of other plants which often adhere to its leaves. 
It is therefore partly a vegetable as well as an animal 
feeder. 
PINGUICULA GRANDIFLORA. 
This species is so closely allied to the last that it is ranked 
by Dr. Hooker as a sub-species. It differs chiefly in the 
larger size of its leaves, and in the glandular hairs near the 
basal part of the mid-rib being longer. But it likewise 
differs in constitution; I hear from Mr. Ralfs, who was so 
kind as to send me plants from Cornwall, that it grows in 
rather different sites; and Dr. Moore, of the Glasnevin 
Botanic Gardens, informs me that it is much more manage- 
able under culture, growing freely and flowering annually ; 
whilst Pinguicula vulgaris has to be renewed every year. 
Mr. Ralfs found numerous insects and fragments of insects 
adhering to almost all the leaves. These consisted chiefly 
of Diptera, with some Hymenoptera, Homoptera, Coleoptera, 
and a moth; on one leaf there were nine dead insects, besides 
a few still alive. He also observed a few fruits of Carex 
pulicaris, as wellas the seeds of this same Pinguicula, adhering 
to the leaves. I tried only two experiments with this species ; 
firstly, a fly was placed near the margin of a leaf, and after 
16 hrs. this was found well inflected. Secondly, several 
small flies were placed in a row along one margin of another 
leaf, and by the next morning this whole margin was curled 
inwards, exactly as in the case of Pinguicula vulgaris. 
PINGUICULA LUSITANICA. 
This species, of which living specimens were sent me by 
Mr. Ralfs from Cornwall, is very distinct from the two fore- 
