DRY FRUITS. 239 



side of its wings decorated with nacreous markings. 

 This butterfly is fairly abundant, but inexperienced 

 collectors do not notice it on the wing, because of its 

 resemblance to the Bath White (P. Daplidice). If 

 you spend the Winter in Rome, and visit the ruins of 

 the Colosseum, you will find the Biscutella growing 

 plentifully all round the arena. 



I 



Fig. 87. AXTHOCHAKIS EVPHEXOIDES, THE GLOUY OF PROVENCE. 



At the comer of the Place Massena rosaries are 

 sold, made of the curious horned fruits of the Water 

 Chestnut or Water Hyacinth (Trapa,Fig. 86) strung to- 

 gether. The quadrangular seed-cases of the Eucalyptus 

 are treated in the same manner. The Water Chestnut, 

 as its Latin name implies, floats on the surface of some 

 marsh or swamp. The lower leaves resemble roots, the 

 upper form a rosette. The stalks of these are inflated, 

 so as to make the plant more buoyant. If you cut 

 off the blade of a leaf, and, detaching the stalk from 

 the plant, pull the little green spindle under water 

 and release it suddenly, it will spring up into the air 

 like a salmon. Trapa does not grow in the Var 

 swamps. Mr. Bicknell informs me that these 

 rosaries are made of Trapa Verbanensis, a species 

 known only in the Lago Maggiore, opposite Arona, 

 in the bay of Angera. 



Under the Casuarma (Fig. 88), everywhere, the 



