HARDY WATER AND BOG PLANTS. 



393 



The following plants are also 

 tog-garden : — 

 Acorus gramineus 

 Arundo Donax 

 Arundinaria, sorts 

 Asarum cordatum 



„ Hartwegi 

 Bambusa, sorts 

 Carex acuta variegata 

 Cyananthus lobatus 

 Eomecon chionantha 

 Equisetum, British forms 

 Eulalia, sorts 

 Helonias bullata 

 Hottonia cordata 

 Juncus zebrina 



,, spiralis 

 Lastrea Thalictrum (from the F< 



doing well, either at Cambridge or in my 



Lysimachia clethroides 



„ Numularia 



,, vulgaris 

 Monarda didyma 

 Osmunda regalis and varieties 

 Polygonum compactum 



„ Sieboldii 

 Ranunculus Lingua 

 Bodgersia podophylla 

 Scrophularia nodosa variegata 

 Senecio pulcher 



„ retusa 

 Sium latifolium, Water Parsnip 

 Struthiopteris pennsylvanica 

 Symphytum bohemicum 

 ns) Trollius europasus (on the banks) 



INSECTIVOBOUS PLANTS. 



By Mr. E. Lindsay, F.E.H.S. 



[Bead September 22, 1891.] 



Insectivokous plants are of two kinds — first, those in which 

 there is a true digestive process ; and, second, those in which there 

 is merely decomposition and absorption of the liquid products. To 

 the first group belong Drosera, Drosophyllum, Dionasa, Eoridula, 

 Byblis, Aldrovanda, Pinguicula, Nepenthes, and Cephalotus ; and 

 to the second, Sarracenia, Darlingtonia, Heliamphora, and 

 Utricularia. These are all dicotyledonous plants, and consist of 

 several hundreds of species, which in one way or other capture 

 insects and use them as food. They are remarkable for the 

 adaptations of structure and function by which insects are secured, 

 and for their obvious approach to the animal mode of nutrition. 

 The distribution of insectivorous plants is somewhat remarkable, 

 many being restricted to very small areas, and one half of the 

 genera being monotypic. The large genus Drosera has an all 

 but world-wide distribution ; its congeners, however, are restricted 

 to well-defined and usually comparatively small areas. Thus 

 Drosophyllum occurs only in Portugal and Morocco, Byblis in 

 Tropical Australia, Eoridula in South Africa ; and although 

 Aldrovanda is found in Queensland, in Bengal, and in Europe — 

 a wide distribution explained by its aquatic habit — Dionaea is 



