Magnolia

The genus name Magnolia was coined by the French botanist Charles Plumier in 1703, in honor of Pierre Magnol (1638–1715), the director of the Montpellier Botanical Garden and one of the most important botanical systematists of the seventeenth century. Magnol never traveled to the Americas and never saw a magnolia; the honor was bestowed for his scholarly contributions — particularly his Prodromus Historiae Generalis Plantarum (1689), in which he proposed the concept of plant families, grouping genera into larger natural categories based on shared characteristics. This was a significant conceptual advance in botanical classification, preceding Linnaeus's formalization of the system by several decades. Pierre Magnol gave his name to a genus he did not discover, because a colleague judged that his ideas deserved to outlast his manuscripts.

Magnolias are among the most ancient lineages of flowering plants still living. The genus and its close relatives in the family Magnoliaceae diverged from other angiosperms very early in flowering plant evolution — fossils identified as magnolia relatives have been found in rocks dating to around 95 million years ago, well into the Cretaceous period. This antiquity has a functional consequence: magnolias evolved before bees became the dominant pollinating insects. Their pollinators are beetles. The large, thick, waxy tepals (petals and sepals are not clearly differentiated in magnolias, so botanists use the neutral term) are physically robust — designed to withstand the clumsy, chewing movements of beetles rather than the delicate probing of bees or butterflies. The flowers produce no nectar; the reward they offer beetles is pollen and a warm, sheltered space to feed and mate.

The distribution of magnolias traces the outlines of ancient floristic connections. The genus occurs naturally in two widely separated regions: eastern Asia (from the Himalayas through China and Japan to Southeast Asia) and the Americas (from the southeastern United States through Mexico and the Caribbean to the Andes of South America). These two populations have been separated since the closing of the Bering land bridge and the cooling of the Arctic, which eliminated the continuous northern forests that once connected Asia and North America. Plant geographers call this a disjunct distribution — one genus in two places with no wild populations in between — and it is a recurring pattern in the flora of the northern hemisphere, suggesting that before the Pleistocene ice ages, a continuous temperate forest flora stretched across the northern continents. Magnolias are living evidence of a lost forest.

Magnolia grandiflora — the Southern magnolia, the large-flowered evergreen species native to the southeastern United States — holds a special place in the symbolic geography of the American South. Its large white flowers and glossy dark leaves became associated with the antebellum plantation landscape through literature, film, and the persistent mythologizing of the Old South. Tennessee and Mississippi have both designated magnolia as their state tree; Louisiana chose it as the state flower. This appropriation is complicated: the magnolia predates European settlement of North America by millions of years, and the association with plantation landscapes is an overlay from a specific and violent historical period onto a genus that is simply, botanically, very old. The magnolia does not know about the Civil War. Its beetle pollinators are indifferent to state flags.