Isoetes abyssinica Chiov., 1809

Fischer, Eberhard & Lobin, Wolfram, 2022, The genus Isoetes (Isoetaceae) in Central Africa (Democratic Republic of the Congo, Rwanda, Burundi) with the description of three new species, Willdenowia 52 (3), pp. 315-334 : 316

Isoetes abyssinica Chiov. in Atti Soc. Naturalisti Mat. Modena 64: 45. 1933. – Lectotype (designated here, following Jermy in sched.): Ethiopia, Amhara – Dembià, valle Cococc sopra Gondar , pascoli rocciosi aprici lungo rigagnoli asciutti, 3 Sep 1909, Chiovenda 1809 ( FT006224 ). – Fig. 1.

Description — Megaspores c. 480 × 460–480 µm; proximal face trilete, densely pustulate, pustules 20–50 µm in diam., not anastomosing, sometime tuberculate, tubercles thin in between, 7.5–15 µm in diam., waxes with threads slightly felty, ridges c. 50 µm wide and c. 20 µm high; distal face clavate with distant projections up to 60 µm high and 40–50 µm in diam. and small tubercles 20–24 µm in diam. in between, densely covered by short threads, clavate projections above with short or lacking threads. – Fig. 2.