AMERICAN VINES. 



Rupestris Metallic a. This assemblage of forms is also 

 called Rupestris a feuilles metalliques, Rupestris metallique, 

 Rupestris a feuilles plombees, Rupestris Saubens, Rupes- 

 tris Giraud, and is not 

 without merit. If the 

 Rupestris du Lot did 

 not exist, it would cer- 

 tainly be the Rupestris 

 Metallica which would 

 have been most prop- 

 agated in clay cal- 

 careous soils, where 

 the Rupestris du Lot 

 actually occupies, and 

 will occupy, a more 

 and more predominant 

 place. The vigour of 

 the Rupestris Metal- 

 lica is a little inferior 

 to that of the Rupes- 

 tris du Lot; their re- 

 sistance to the phyl- 

 loxera, which they owe 

 to their positive rela- 

 tion to the Mustang, 



Fig. 40. Leaf of Rupestris Metallica. and On which depends 



slightly their relative inferiority of resistance to drought, 

 will make one always prefer the Rupestris du Lot. 



Here is the description given by Mazade of one of the 

 best forms of Rupestris Metallica: "Stump vigorous. 

 Leaves (Fig. 40) orbicular, 

 brilliant , parchment-like , 

 very thick, hard; metallic 

 sheen; slightly folded along 

 the mid-rib, margins com- 

 pletely plane; very small 

 difference in dimensions 



between the leaves on the </ 7 T\ 



principal as compared with || 



the secondary ramifications. Fig. 4 i. Petioiar Sinus of Rupestris 

 Indentations regular, saw Metallica. 



shape; petiole forming an acute angle with the limb, 

 which gives to the vertical branches a special appearance of 



