Hymenophyllum tunbridgense

tunbri(d)gense: this fern was first collected in southern England, in the towns of either Tonbridge or Tunbridge Wells.

Rhizome wiry, bearing fronds up to 7 cm apart. Stipe up to 3 cm long, filiform, not winged or narrowly winged in the upper half. Lamina lanceolate, narrowly oblong or narrowly elliptic in outline, up to 14 × 3.5 cm. Pinnae bilaterally pinnatifid to 2-pinnatifid in up to 25 lobes; ultimate lobes linear, glabrous, margins entire basally, becoming serrate towards the tips. Sori borne on the lowest acroscopic lobes, soral valves serrate, base of the sorus not winged by the lamina lobes.

Gabon, Kenya, Madagascar, Malwi, Mauritius, Mozambique, South Africa, Swaziland, Tanzania, Zimbabwe