单花水油甘 dan hua shui you gan

Shrubs up to 1 m tall, monoecious, glabrous throughout; stem terete, gray-brown; branches angular; branchlets alternate or 2-4-fascicled, flattened, 2-winged. Leaves distichous; stipules triangular, margin membranous; petiole very short to almost absent; leaf blade ovate or oblong-ovate, 4-5 × ca. 2 mm, thinly leathery, base oblique, apex acute; lateral veins 3 pairs, obscure abaxially, slightly conspicuous adaxially. Inflorescences axillary, usually 1-flowered; pedicels ca. 2 mm. Male flowers: sepals 4, rounded, ca. 1 mm, margin membranous; disk glands 4, oblong-ovate; stamens 2; filaments connate into column; anthers parallel, thecae transversely dehiscent. Female flowers: sepals 6, broadly ovate, ca. 1.2 mm, persistent in fruit; disk discoid, surrounding ovary base; ovary globose, 3-celled; styles 3, bifid at apex. Capsule globose, ca. 3 mm in diam., brownish. Fl. and fr. throughout year.

● Montane sparse forests, rivulets, scrub; 300-400 m. S Hainan.