CEP AGES. 167 



i 



are frequent in the centre of the United States; they are 

 generally very vigorous, and live in the same soils as the 

 Riparias, from which they get their properties of adapta- 

 tion and resistance. Millardet and de Grasset created many 

 hybrids of this nature. 



H/brids of V. Cinerea and V. Coriacea The varied 

 fprms of vines, to which Munson gave the name of V. Simpsoni, 

 and which he found in the south-west of Florida, are only 

 hybrids of Cinerea and Coriacea. These vines, like the V. 

 Munsoniana, do not offer any cultural interest for us, on 

 account of their originating in a tropical country; they were 

 introduced into France in 1888; they grow badly in slightly 

 calcareous soils, without, however, becoming yellow. 



T. V. Munson discovered a wild hybrid of Simpsoni and 

 Labrusca, the Wofford's Winter Grape, which grows in 

 Georgia, together with a hybrid Simpsoni X Cordifolia 

 growing in Florida. These forms are of no more interest 

 than the Simpsoni itself. The same may be said of a few 

 hybrids of Cordifolia X Coriacea and ^Estivalis X Coriacea 

 observed in Florida. 



Hybrids of V. Cinerea and V, Riparia. They are not 

 frequent in a wild state, and were imported into France as 

 Riparias. Some are very vigorous, and have a larger trunk 

 than that of Riparia, from which they are distinguished by 

 their leaves being thicker and by the very numerous short 

 hairs on the main and secondary ribs of the under- face ; in 

 some forms the canes are fluted. They have not been seri- 

 ously studied from the point of view of adaptation. They 

 must be very sensitive to chlorosis, if the characters of 

 their parent have been transmitted ; but may, perhaps, have 

 some value for damp and compact soils. 



Hybrids of V. Monticola and V. Rupestris. No 

 hybrids of this nature have yet been observed in a wild state ; 

 they might, perhaps, exist, but would certainly be exceptional, 

 for the two species do not generally grow in the same regions 

 or in similar soils. It has been wrongly surmised that certain 

 vigorous forms of Rupestris, with light lustrous small leaves, 

 were hybrids of Monticola and Rupestris ; this opinion is only 

 founded on hypothesis, especially as far as Rupestris du Lot 

 is concerned. * sjpt. , 



Hybrids of V. Monticola and V Riparia. These 

 hybrids are still very little known. It is probable that their 



