Trigonostemon flavidus Gagnep.

Shrubs 1-2 m tall; branchlets densely yellow-brown hirsute; older branches scabrous, glabrescent. Leaves densely clustered in apparent whorls; petiole 3-6 mm, densely yellow-brown hirsute; leaf blade oblanceolate to oblong-oblanceolate, 12-35 × 4-10 cm, membranous to papery, densely hairy, basally attenuate into auriculate or subcordate base, margin entire or obscurely serrulate beyond middle, ciliate, apex shortly acumi nate, acumen caudate. Male flowers: inflorescences axillary, racemelike, ca. 2.5 cm, few flowered; bracts 4 or 5, linear- lanceolate, slightly falcate, 1-2 cm; sepals 5, hirsute, 3 larger, 2.5-3 mm, 2 smaller, ca. 1.5 mm; petals obovate-elliptic, ca. 4.5 mm, purple-red; disk glands 5, ca. 0.8 mm; stamens 3; filaments connate. Female flowers axillary, solitary; pedicels short, or sometimes inserted in upper part of to 6 cm inflorescences; sepals lanceolate, ca. 5 mm, hirsute, apex long ciliate, acuminate; petals elliptic or obovate, 4.5-5 × ca. 4 mm; disk glands 5, oblong; ovary densely hairy; styles bifid. Fruiting peduncles 1-8 cm; persistent sepals and bracts lanceolate, ca. 2 cm. Capsules subglobose, ca. 6 mm in diam., chestnut brown, with stripes of yellow spots. Fl. May-Oct, fr. Aug-Dec.

Hainan [Laos, Myanmar, Thailand].

Dense forests; ca. 300 m.

Trigonostemon heterophyllus Merrill.

Trigonostemon flavidus là một loài thực vật có hoa trong họ Đại kích. Loài này được Gagnep. miêu tả khoa học đầu tiên năm 1922 publ. 1923.