海南木 hai nan jian mu

Dysoxylum filicifolium H. L. Li; D. hainanense Merrill; D. hainanense var. glaberrimum F. C. How & T. C. Chen; D. mollissimum var. glaberrimum (F. C. How & T. C. Chen) P. Y. Chen.

Trees 7-10(-20) m tall. Branchlets puberulent; apical buds with leaves like clenched fists. Leaves alternate, 25-30(-45) cm, odd-pinnate; petiole and rachis glabrous or villous; leaflets 20-23, opposite to subopposite; petiolules 3-5 mm, glabrous or pubescent; leaflet blades oblong to oblong-lanceolate, 5-11(-13) × 2-3.5(-4.5) cm, membranous, abaxially glabrous or sparsely villous but densely villous on midvein and secondary veins, adaxially glabrous or densely pubescent only on midvein, secondary veins 12-15 on each side of midvein and outspreading, base oblique, apex acuminate. Thyrses axillary, ca. 18 cm or more, lax and with a few scattered flowers, nearly glabrous to sparsely pubescent; branches few, sparse, ca. 5 cm at base of thyrse. Flowers 4-merous, ca. 9 mm. Pedicel 1-2 mm, pubescent. Calyx disciform, ca. 2 mm in diam., pubescent, lobes round. Petals yellow, linear to spatulate, ca. 8.5 mm, glabrous, apex obtuse. Staminal tube cylindric, ca. 7 mm, both surfaces white villous, apical margin crenate; anthers 8. Disk cylindric, ca. 3 mm high, margin ciliate and crenate. Ovary densely villous; style 7-8 mm. Capsule yellow when dry, globose, 1.6-2 cm in diam.; pericarp thin and flexible. Fl. May-Sep and Jan-Feb, fr. Oct-Nov and Mar-Apr.

Forests and ravines in mountainous regions; low to middle elevations. Guangdong, Guangxi, Hainan (Qiongzhong), S Yunnan [Bhutan, India (Assam), Indonesia, Malaysia, Myanmar, Philippines].

The plants in China are Dysoxylum mollissimum subsp. mollissimum. Dysoxylum mollissimum subsp. molle (Miquel) Mabberley occurs in E Australia, Indonesia, Pacific islands, and Papua New Guinea.