Archidendron xichouense (C.Chen & H.Sun) X.Y.Zhu

Trees, ca. 15 m tall. Branchlets terete. Leaf petiole 4-6 cm; petiolar gland above middle, raised and concave, 1.5-3 mm high, 3-7 mm in diam.; pinnae 1 pair, 6-10 cm; petiolules 5-7 mm; leaflets 2 pairs, opposite, elliptic, 9-25 × 4-10 cm, termi­nal one larger, base cuneate, apex acuminate. Heads 10-15-flowered, arranged in panicles 10-20 cm. Calyx campanulate, ca. 3 mm; teeth ca. 0.5 mm. Corolla tubular, ca. 8 mm, puberu­lent; lobes ovate, ca. 2 mm. Staminal tube ca. as long as corolla tube. Ovary ca. 3 mm, glabrous. Legume slightly curved, cylin­dric, ca. 4.5 cm in diam. Seeds cylindric, 2-3 cm high, ca. 3 cm in diam., both ends truncate; testa hardened.