狭瓣杨桐 xia ban yang tong

Shrubs or trees, 2-18 m tall. Young branches grayish brown, glabrous; current year branchlets densely yellowish brown spreading villous; terminal buds yellowish brown spreading villous. Petiole 2-3 mm, pubescent; leaf blade lanceolate to oblong-lanceolate, 6-10 × 1.7-3 cm, thinly leathery, abaxially pale green and densely yellowish brown appressed pubescent particularly along midvein, adaxially dark green and glabrous, secondary veins 10-13 on each side of midvein and visible on both surfaces or abaxially slightly raised, base broadly cuneate to rounded, margin entire, apex acuminate, long acuminate, or rarely subcaudate. Flowers axillary, solitary or paired. Pedicel 5-9 mm, densely pubescent; bracteoles persistent, ovate to long ovate, 1-3 mm, outside densely pubescent, apex acute. Sepals long ovate, 4-6 × 2-2.5 mm, outside densely yellowish brown appressed pubescent, margin ciliolate or sometimes intermixed with glands, apex acute. Petals yellowish white, lanceolate to obovate-lanceolate, 6-12 × 2-3 mm, outside densely yellowish brown sericeous along median portion, apex acuminate. Stamens 15-17, 4-6 mm; filaments 1.5-2 mm, nearly distinct, glabrous; anthers linear-lanceolate, 2-2.5 mm, with filiform trichomes, connective exserted for 1-1.5 mm. Ovary ovoid, yellowish brown tomentose, 3-loculed with many ovules per locule; style 4-9 mm, completely united, glabrous. Fruit globose, ca. 8 mm in diam., many seeded; persistent sepals reflexed. Seeds brown, compressed reniform, shiny. Fl. Jan-Feb, fr. May-Jun.

Forests on mountain slopes or tops; 500-1000 m. Guangxi (Longzhou), Yunnan (Funing) [N Vietnam].