Compilation
Ephemerum spinulosum

Plants less than 2.2 mm. Leaves broadly lanceolate to oblong-lanceolate or ligulate and acuminate, often narrowed distally from slight to prominent shoulders, 0.8–2.4 × 0.17–0.27 mm; margins serrate distal to the proximal third, often with narrow shoulders bearing one or more teeth; apex acuminate, toothed, and densely papillose in the distal half; costa thin at base, percurrent or excurrent; areolation markedly dense distally; median laminal cells slightly papillose; distal laminal cells densely papillose. Capsule with few stomates, scattered throughout. Spores various, commonly sub-globose, 68–120 × 50–80 µm, dark brown.