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Poncirus Rafin., Sylva Tellur. 143. 1838. Bailey, Stand. Cyclop. Hort. 5:2751.1917; Tanaka, Sp. Problem in Citrus, Revisio. Aurantiacaerum ix. 8.29.1954.
Robust shrubs, glabrous with stiff and sharp spines. Leaves trifoliolate; petioles winged. Flowers axillary, l(-2), pentamerous, bisexual. Stamens free, Ovary and style pubescent. Fruit small, globose, pubescent. Pulp vesicles with oil cells in the midline. Seeds glabrous.
A monotypic genus, indigenous in N. China and Japan; cultivated elsewhere. It has been separated from Citrus on account of its trifoliolate leaves and free stamens.
Lower Taxon
Related Synonym(s):
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