Q: How many species of peony are there? A: There is still some debate about the classification of peonies however depending upon the classification system used there are about 35 species. The most well known species of peony is Paeonia lactiflora. This peony is sometimes referred to as the Chinese peony because of the extensive breeding work done by Chinese horticulturalists with this plant. The so-called old-fashioned double peonies are almost all cultivars of this species.

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