Zanthoxylum piasezkii ( Chuān shǎn huājiāo) is a tree from the family Rutaceae.
Description Zanthoxylum piasezkii are deciduous trees that are typically tall.
Shrubs or trees, tall, all parts glabrous. Stems and branches with brownish red prickles. Leaves 7-17-foliolate; rachis marginate; leaflet blades sessile, orbicular, broadly elliptic, or obovate-rhombic, 3-25 × 3-8 mm, thickly leathery, pale brown to blackish brown when dry, midvein impressed, secondary veins inconspicuous, base symmetric or slightly oblique, margin apically crenate. Inflorescences terminal. Perianth in 2 irregular series or 1 series, with 6-8 ± undifferentiated tepals. Tepals broadly deltoid, ca. 1.5 mm or longer. Male flowers: pedicel 5-8 mm; stamens 5 or 6; connective blackish brown when dry, with oil gland on tip; rudimentary gynoecium projecting outward and cushion-shaped. Female flowers: carpels 2 or 3(or 4); styles recurved. Fruit follicles purplish red, 4-5 mm in diameter, with a few protruding oil glands. Seeds 3-4 mm in diameter. Flowers in May, fruiting in June-July. Found at altitudes of in the provinces of Southern Gansu, Western Henan, Southern Shaanxi, and Sichuan.
Classification The species was published in the Russian journal Trudy Imperatorskago S.-Peterburgskago Botaničeskago Sada in 1889. It would later be accepted in 2008's Flora of China.
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