Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
Our petunias, so familiar as ornamentals, are natives of South America, rarely escaped temporarily to roadsides, fields, shores, and other such sites. First collected in 1923 in Washtenaw Co.
The common garden petunia is an annual of hybrid origin, and has been so extensively manipulated and selected that drawing lines between species and hybrids is difficult. The collective name P. ×atkinsiana is used here for the few recorded escapes from cultivation.