Peonies are ancient botanical travelers that hide a complex history of genetic hybridisation
In short: Peonies are not just garden favorites; they are survivors of ancient climate shifts. While they bloom for only a week or two, their genetic lineage spans continents and millions of years. From the imperial gardens of China to modern Alaskan fields, these plants possess a history as layered as their petals.
The genus Paeonia, the sole member of the family Paeoniaceae, consists of about 35 species native to the Northern Hemisphere. While often associated with temperate gardens, their evolutionary path is marked by a disjunct distribution. Genetic analysis reveals that many Mediterranean species are actually hybrids of ancestors that once thrived in eastern Asia. Scientists believe these parent species were forced to migrate or were wiped out by Pleistocene glaciations, leaving the hybrid descendants to persist in southern European refugia.
These plants are categorized into three sections: the woody Moutan, the North American Onaepia, and the diverse Paeonia section. The latter is defined by a complex reticulate evolution, where about half of the species are tetraploid. This genetic complexity is further illustrated by the Itoh hybrids, a category created in 1948 when Toichi Itoh successfully crossed tree peonies with herbaceous varieties. These intersectional hybrids combine the woody traits of tree peonies with the herbaceous growth habit, offering increased wilt resistance and a longer flowering season.
Cultivation of the peony has deep historical roots, particularly in China, where they were used for medicine as early as the sixth and seventh centuries. By the Tang dynasty, they were staples of imperial gardens, and by the tenth century, Luoyang had become the center of their cultivation. Today, the industry is global; the Netherlands produces about 50 million stems annually, with the 'Sarah Bernhardt' variety alone accounting for over 20 million. Despite their popularity, peonies remain biologically intriguing, producing nectar on their buds to attract ants—a likely adaptation to deter harmful insects—and requiring years to re-establish themselves after being moved.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: Peony
- Also: www.rhs.org.uk — Peony (Paeonia) / RHS Plant Guide
To cite this card, link to https://intellectplus.co.uk/app/gardening-peony.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Plants · More in Gardening · Latest · A–Z · All topics
