Trigonostemon albiflorus Airy Shaw

Shrubs ca. 1 m tall; branchlets sparsely appressed pubescent to glabrescent. Leaves uniformly spaced; stipules small; petiole 2-5.5 cm, sparsely pilose to glabrous, apex with 2 subulate glands; leaf blade broadly elliptic, 9-16 × 3.5-6 cm, thinly leathery or papery, both surfaces glabrous, adaxially verruculose, base cuneate, margin entire or obscurely undulate-crenellate, apex acute to acuminate, rarely obtuse; basal veins 3, lateral veins ca. 6, delicate. Inflorescences axillary or terminal, panicles, to 21 cm, bisexual, bracts subulate, ca. 2.5 mm, villous. Male flowers: pedicel delicate, 3-7 mm, glabrous; sepals obovate, 1-2 mm, apex rounded, glabrous; petals broadly spatulate, ca. 3.5 × 2 mm, white, membranous, clawed, apex rounded; disk cupular, ca. 0.5 mm high; stamens 3; filaments connate for ca. 2 mm, free part to 0.5 mm. Female flowers: pedicels clavate, 1-1.5 cm, glabrous; sepals 5, ovate, ca. 3 mm, exterior sparsely villous; petals as in male, ca. 7 mm; disk cupular, ca. 0.5 mm high, margins undulate or entire; ovary glabrous; styles free, ca. 1 mm; stigmas bifid, divaricate. Fruiting pedicels clavate, to 2.8 cm; capsules ca. 1 cm in diam., glabrous. Seeds elliptic, ca. 6 mm in diam., brown with stripes of gray-white spots. Fl. Apr-May, fr. Jun-Aug.

S Guangxi [N Thailand].

Montane thickets; 500-600 m.

Trigonostemon leucanthus Airy Shaw; T. leucanthus var. siamensis H. S. Kiu.

Trigonostemon albiflorus là một loài thực vật có hoa trong họ Đại kích. Loài này được Airy Shaw miêu tả khoa học đầu tiên năm 1971.