蝴蝶果 hu die guo

Baccaurea cavaleriei H. Léveillé, Fl. Kouy-Tchéou, 159. 1914-1915; Sinopimelodendron kwangsiense Y. Tsiang.

Trees, 10-25 m tall. Branchlets sparsely minutely stellate-pubescent when young, glabrescent. Stipules subulate, 1.5-2.5 mm, sometimes glandular; petiole 1-4 cm, swollen at both ends; leaf blade elliptic, oblong-elliptic, or lanceolate, 6-22 × 1.5-6 cm, thickly papery, base cuneate, with 2 subulate stipels, ca. 0.5 mm, base drying black, apex acuminate, rarely acute. Panicles bisexual, yellowish gray tomentulose; bracts lanceolate, 2-4(-8) mm. Male flowers: glomerules 7-13-flowered; calyx lobes (3 or)4 or 5, 1.5-2 mm; stamens (3 or)4 or 5; filaments 3-5 mm; anthers ca. 0.5 mm; pistillode columnar, ca. 1 mm. Female flowers 1-6, at base or middle of inflorescence; epicalyx lobes 5-8, lanceolate or triangular, 1-4 mm, caducous; sepals 5-8, elliptic-ovate or broadly lanceolate, 3-5 mm, tomentulose; ovary ovoid, 2-locular, often 1-locular by abortion, tomentulose; style ca. 7 mm, thick, upper part spreading, 3-5-lobed, lobes 2- or 3-lobed, papillose. Drupes obliquely ovoid or 2-lobed, 3-5 cm wide, base contracted into stipe, 0.5-1.5 cm, grayish puberulent. Seeds subglobose, ca. 2.5 cm in diam.; testa bony, thick. Fl. and fr. May-Nov.

Forests on limestone or mountain slopes or in valleys; 100-1000 m. Guangxi, S Guizhou, SE Yunnan [N Vietnam].