||rairon, martellana, oriola, balsamea, balsamina, croatina, nera.
||In the wine-growing areas of the provinces of Novara and Vercelli, the practitioners distinguish between two subvariates of this vine: the one with gems well developed and protruding, the other with opposite characters (locally called "a short gem"); And carefully eliminate the second, as less productive. Probably because of this continuous selection, as well as for particularly favorable environment conditions, the productivity of "rare grapes" in the aforementioned provinces is regular and discreetly abundant. In the province of Pavia, however, it complains of a production usually less than normal, due to the sanding, which is so frequent and accentuated that the bunches are excessively spatulate. In Oltrepò pavese, therefore, it would be - as the grape is valuable - to set up a careful selection, possibly with the import of marzas from the province of Novara.
||It is widespread in some Piedmont areas and in Oltrepò Pavese.
||The rare grape is a grape rooted for many centuries in the provinces of Novara and Vercelli in Piedmont and in the province of Pavia in Lombardy, where it is often confused with Bonarda and Creatina. This is due to an erroneous evaluation of 1877 by Di Rovasenda, which confused her with Bonarda of Gattinara, even though she used a double name to emphasize a different hypothesis. The same mistake was made in 1906 by Molon. Recently, however, there is no doubt that the two vines are different and have no kinship in 1906, it considered the Rare Grapes a synonym for the Bonarda vine. Today it has been established that there is no kinship between the two even though some accepted synonyms are now accepted in popular vocabulary such as Bonarda di Cavaglià, Bonarda di Gattinara, Balsamina and others less used.
||Leaf: medium size; Pentagonal shape; five lobes. Petiole breast in lira; Upper side breasts mostly closed, often with superimposed edges, more rarely U; Lower lateral breasts U or a lira, sometimes to V. Upper side virtually glabra (some rare long hair); Lower cotone page also on ribs of 1 ° -2 ° -3 ° order. Lembo generally flat (sometimes bent to grid in Novara clones). Flat lobbies, often with slightly revolving edges; Angle of the top of the acute terminal lobes. Flap surface is mostly smooth (sometimes a bit vesicular in Novara clones). Main ribbon color: top, green; On the bottom, light green (with some slight rose shades in the pavone clone). Medium-sized, irregular, broad-centered teeth with straight margins. Green leafy sheet of green more or less loaded on the top, light green on the bottom; opaque; Ribs of 1 ° -2 ° -3 ° degree protruding, planes the other.
Bunch: average size (the volume of bunches is quite variable in this vine). Moderately compact or loose (even this character is changeable, although the tendency to laxity is obvious). Elongated, conical, winged (sometimes conical without wings, or sometimes even short and short). Visible, green or half-legged, rather large, approximately 1/4 of the bunch, which can be thought to be cm. 20 - 25.
Acino: medium or medium-large; Round or subelithic, regular; Prominent, non-persistent navel; Circular cross section, regular; Pruinous peel, quite consistent, but not barky; Light blue, almost black, regularly worn; Colorless juice; Juicy pulp with a simple flavor; Medium-long pedicel light red; Evident red rusty look; Short and red brush; Separation of the pedicle from the bowl is not easy.
||The wine obtained from the rare grape grape is ruby red with purple reflections. On the palate it is floral.
||Resistance to adversity: it has normal resistance to mildew, lacking in ozone. It is subject (especially in the rainy and cold springs) to the flowering of flowers; It is a disadvantage, however, that, as has been said, is much more lamentable in the wine-growing area than in that Novara-Vercellian wine region. It resists fairly well to hail strokes (unheated healing) and rotten grapes, even in fruit.