Abstract
The common garden petunia, Petunia hybrida, is derived from P. integrifolia and P. axillaris, two of many Petunia species endemic to South America. The geographic distribution includes temperate and subtropical regions of Argentina, Uruguay, Paraguay, Bolivia, and Brazil, with a center of diversity in southern Brazil. The presence of seven chromosomes and a number of morphological, anatomical, and biochemical characteristics differentiate the genus from its sister taxon, Calibrachoa. Included in this chapter is a taxononomic guide for the 14 currently recognized species, some of them restricted to very small geographic areas. Species diversity is in danger of diminishing significantly due to human intervention, particularly in the form of grassland destruction.
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CITATION STYLE
Stehmann, J. R., Lorenz-Lemke, A. P., Freitas, L. B., & Semir, J. (2009). The genus Petunia. In Petunia: Evolutionary, Developmental and Physiological Genetics (Second Edition) (pp. 1–28). Springer New York. https://doi.org/10.1007/978-0-387-84796-2_1
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