厚柱山麻杆 hou zhu shan ma gan

Alchornea formosae Müller Argoviensis ex Pax & K. Hoffmann; A. liukiuensis Hayata var. formosae (Pax & K. Hoffmann) Hurusawa; A. trewioides var. formosae (Pax & K. Hoffmann) Pax & K. Hoffmann.

Shrubs, 1-2 m tall, monoecious. Branchlets puberulent or glabrous. Stipules lanceolate, 3-6 mm; petiole 3-7 cm; leaf blade broadly ovate or triangular-ovate, 9-12 × 6-11 cm, papery, abaxially pilose along midrib, base broadly cuneate or subcordate, with 4 glands, stipels subulate, ca. 2 mm, margins remotely serrulate, apex acuminate; basal veins 3. Inflorescence axillary or terminal, unbranched, usually bisexual, 7-10 cm, pilose; bracts triangular-ovate, 3-4 mm. Male flowers 9-11 per bract; pedicel 1-2 mm; sepals 3 or 4, ca. 2.5 mm, glabrous; stamens 8. Female flowers: pedicel ca. 1 mm; sepals 5, triangular-ovate, unequal, 2.5-3.5 mm, pilose; ovary puberulent; styles 3, sublanceolate, thick, 4-5 mm, connate for ca. 1 mm. Capsule globose, 3-lobed, ca. 10 mm in diam., subglabrous. Fl. Mar-Apr, fr. Jun-Jul.

● Secondary forests; 100-200 m. N Taiwan.