FLORA OF VIETNAM
Hypericaceae
Hypericum dissectum Aver., sp. nov.**

Ha Giang prov., Quan Ba distr., Cao Ma Po commune, Chin Chu Lin village, around point 23°05ʹ13.5ʺN 104°48ʹ30.2ʺE, rocky outcrops on steep rocky slopes composed with eroded karstic limestone at elevation 1750–1950 m a.s.l. Highly degraded remnants of primary evergreen broad-leaved very humid forest and evergreen secondary shrubs. Terrestrial herb on open grassy slope. Not common. 20 October 2018, L. Averyanov, Nguyen Sinh Khang, T. Maisak, Truong Duc Thieu, VR 1076 (holotype – LE01054650, isotype – HN). The species may be close to group of species with ciliate sepals including Hypericum himalaicum N. Robson, H. ludlowii N. Robson and H. trigonum Hand.-Mazz., but well differs in stout, erect stems branching in apical part and large ovate sepals deeply dissected into long straight linear-subulate fringes, often bearing black gland at apex.