ginkgo

Ginkgo is a phonetic transcription of the Japanese reading of the Chinese characters 銀杏 (yínxìng), meaning 'silver apricot' — a reference to the pale, translucent seed enclosed in the fruit. The Japanese reading of these characters is ginkyō, and when the German naturalist Engelbert Kaempfer observed and recorded the tree during his stay in Japan (1690–1692), he transcribed the pronunciation imperfectly, writing 'ginkgo' — transposing the k and y — in his Amoenitates Exoticae (1712). When Linnaeus formally named the tree in 1771 as Ginkgo biloba, he used Kaempfer's erroneous transcription as the species' official name. Botanists have been aware of the error for over two centuries — the correct transliteration would be 'ginkyo' or 'ginkyō' — but the International Code of Nomenclature for algae, fungi, and plants preserves original names once formally published, and Ginkgo biloba has remained the valid scientific name, error and all, a monument to one German naturalist's hurried notation.

The ginkgo's biological distinctiveness is extraordinary. It is the sole living species of the division Ginkgophyta — a plant lineage that was diverse and globally distributed during the Jurassic period, when dinosaurs were the dominant large animals and the continents occupied different positions. Fossil ginkgo leaves, virtually identical in their fan-shaped, bilobed form to those of the living tree, are found in Jurassic and Cretaceous deposits worldwide. The living ginkgo survived into the present in cultivation in Chinese Buddhist monastery gardens in eastern China, particularly around the temple complexes of Zhejiang and Jiangsu provinces, where monks preserved the tree through centuries of cultural upheaval. Whether any genuinely wild population of ginkgo survived into the modern period is debated; the tree may be, in effect, a living artifact of Chinese monastic horticulture.

The ginkgo's relationship with Chinese Buddhism is among the most consequential plant-religion associations in history. The tree was regarded as auspicious and sacred in Buddhist contexts — its longevity, its resilience (specimens over 1,000 years old are known), and its autumn gold color all contributed to a symbolic value that led to its planting at temples throughout China, Korea, and Japan. When Buddhism spread through East Asia, the ginkgo went with it, carried as a sacred tree whose planting near a temple was both devotional act and ecological insurance. The result is that the ginkgo survives today primarily because of its religious associations — a secular tree preserved by faith, a prehistoric survivor saved by monks.

The ginkgo's chemistry is as distinctive as its phylogeny. The fleshy outer coating of the seed contains butanoic acid and hexanoic acid — short-chain fatty acids that produce an intensely rancid, vomit-like odor when the fruit decays, making female ginkgo trees deeply unpopular as urban street plantings. Male trees, which produce pollen but no fruit, are overwhelmingly preferred in urban forestry for this reason, though the solution creates its own problem: a tree species planted almost entirely as one sex will, over generations, lose the genetic diversity that a balanced population provides. The inner seed kernel is edible and prized in Chinese and Japanese cuisine, particularly in congee, tea ceremony kaiseki, and as a New Year food; it contains ginkgolides, compounds with neurotoxic effects in large quantities, so the pleasurable and the dangerous coexist in the same kernel as they do in the same species.