All the Petunias under cultivation have been derived from two species from South America, - the white is P. nyctagini-flora, the purple, P.violacea, a very small flowered kind. P. parviflora has been in gardens but seems to have had no influence on the race. It is said by a correspondent of Revue Horticulture Beige that the Petunia can be grafted on the shrubby Nicotiana glauca, a plant common in gardens in the southern portion of the United States, and if so a very ornamental object could be obtained.