Hypopterygiopsis jugorum Hu, Zhang & Zhou, 2024, comb. nov.

Hypopterygiopsis jugorum (Hand.-Mazz.) Li Bing Zhang & X.M. Zhou, comb. nov. Basionym: Selaginella jugorum Handel-Mazzetti (1929: 8). Type: CHINA. Yunnan: In region alpine montis Maya inter fluvios Landsang-djiang (Mekong) et Ludjiang (Salween), 4025 m, 23 September 1915, Handel-Mazzetti 8379 (holotype WU031718!; isotypes BM000804011!, K001067384!, S-P-4538!). Distribution. China (Yunnan). Growing at ca. 4000 m (Zhang & Zhang 2022). Notes: This species is similar to Hypopterygiopsis tibetica in having plants 5–11 cm tall, primary leafy branches 2–6 pairs, and dorsal leaves short acuminate or aristate (≤ 0.2 mm), but the former has main stems 1–2-pinnately branched or forked, and strobili compact, more or less isomorphic, and 2–5 mm long, whereas the latter has main stems 2–3-pinnately branched, tertiary branches forked, and strobili lax, more or less isomorphic, and 3–14 mm long (Zhang & Zhang 2022).