830 



This plant is abundant on the limestones of the North of England, 

 but does not occur, so far as I know, on those of South Wales or of the 

 West of England. It is not met with on our chalk hills, but is abun- 

 dant on those about Rouen. At Dreux, still on the chalk hills, it is 

 scarce. The station at Fontainebleau belongs, I think, to the calca- 

 reous beds overlying the sandstone. The * Flore du centre de la 

 France^ by A. Boreau, gives habitats still more to the south. 



The 20th was fair, though cloudy ; but the rain of yesterday, fol- 

 low^ed by a wet night, had left both grass and woods full of water. 

 Still following the advice of M. de Jussieu, I set out through the gar- 

 dens of the chateau to reach the Mail de Henri Quatre. T went up a 

 ridge of baiTen hills on the left, which I erroneously supposed to be 

 connected with the Mail, but found nothing on them. Afterwards, 

 not understanding what was meant by the word Mail, I crossed it 

 without knowing, still supposing the term to belong to a crest of rocks 

 beyond me. However, I gathered in crossing it most of the plants 

 which are said to be found on the Mail, viz., Ononis Columnae, Are- 

 naria triflora (a variety of A. grandiflora according to Duby), Helian- 

 themum apenninum and Fumana (or procumbens), and Teucrium 

 montanum. 



On leaving the Mail and crossing to the opposite crest, I found 

 there abundance of those small mares or pools, but the only rare 

 plant in them was Ranunculus tripartitus. Some tufts of this species 

 growing quite out of the water, although this was high from the late 

 rains, producing hardly any but the capillary leaves, and completely 

 covered with flowers, were very beautiful. On a later occasion, the 

 5th of August, I met with abundance of Elatine hexandra in these 

 pools. Thence I descended into a large barren plain — Plaine du 

 Chene BruU — which is crossed by the road to Lyon, where I added 

 Ranunculus gramineus and Scorzonera austriaca to my collections, 

 but unfortunately both completely out of flower, and almost losing 

 their seeds. Here also grow Trifolium montanum, Alyssum monta- 

 num, Epilobiura angustifolium, Lactuca perennis and Teucrium mon- 

 tanum. Other plants in this part, which are generally diffused in the 

 forest, are the following. 



Trinia glaberrima Viola canina, var. Phalangium Liliago 



Statice plantaginea Arundo Epigejos Silene Otites, an eastern 



Ruhus plicatus Helianthemum guttatum plant with us 



Veronica Teucrium Plantago areuaria Arenaria setacea 



Genista pilosa Linum tenuifolium 



The Orobanches were very abundant and in good condition, but I 



