Taxon: Hydrogonium majusculum

Plate 124. 1–3, Hydrogonium gangeticum. 1, leaf (× 45). 2, gemmae (× 325). 3, apical leaf cells (× 325). 4–5, Hydrogonium majusculum. 4, leaf (× 45). 5, gemma (× 325). 6–7, Hydrogonium pseudo-ehrenbergii. 6, leaf (× 45). 7, median leaf cells (× 325). 8–9, Hydrogonium sordidum. 8, leaf (× 45). 9, apical leaf cell (× 325).