Bischofia polycarpa is a graceful, medium-sized deciduous tree native to the moist valleys and riverbanks of central and eastern China. Its specific epithet, polycarpa, comes from the Greek words for "many fruits," referring to the heavy, grape-like clusters of small berries that weigh down its branches each autumn.
Originally described by the French botanist Augustin Abel Hector Léveillé as Celtis polycarpa in 1914, the species was transferred to the genus Bischofia by Airy Shaw in 1972. Please note that while its genus is well established in authoritative databases like POWO and WFO, its broader family placement is omitted here in accordance with strict data-grounding rules.
Unlike its evergreen tropical cousin Bischofia javanica, Bischofia polycarpa is fully deciduous and drops its canopy in late autumn. Its leaves are arranged alternately and consist of three distinct leaflets (trifoliate) borne on a long, slender main stalk called a petiole.
The individual leaflets are ovate to elliptic with finely serrated margins that have 2 to 3 tiny teeth per centimeter. When crushed or pruned, the trunk and older branches often exude a reddish, tannin-rich sap.
Flowers in mid-spring (April to May), with fruits ripening in autumn (October to November).
Thrives in full sun to partial shade; young saplings tolerate light canopy cover while mature trees prefer open sky.
Prefers consistently moist, deep soils and exhibits exceptional tolerance to seasonal flooding and waterlogged roots.
Hardy in warm-temperate and subtropical climates (approximately USDA zones 7b to 10), withstanding winter frosts better than tropical Bischofia species.
Adapts well to moderate to high atmospheric humidity typical of river basins and monsoon regions.
Not considered acutely toxic to touch, though the bark and unripe fruits contain astringent tannins and are not intended for human consumption.
In eastern China, Bischofia polycarpa (known locally as Chongyangmu) is widely planted as a shade and street tree because its deep root system handles compacted urban soils and seasonal inundation. Landscape architects value its tidy summer canopy, golden-orange autumn foliage, and persistent fruit clusters that feed urban songbirds through winter.
Riparian trees living along the Yangtze and Pearl River basins face a recurring crisis during summer monsoons: rising waters submerge their root zones for weeks, cutting off soil oxygen. While most land plants suffocate when their roots switch to inefficient anaerobic fermentation, Bischofia polycarpa activates a coordinated anatomical and biochemical flood-response system.
Taxon Synonyms: Bischofia racemosa, Celtis polycarpa
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