FIG. 4 in A complete description and conservation assessment of Riella affinis Howe & Underwood (Riellaceae, Sphaerocarpales) new to continental Europe

FIG. 4. — Riella affinis Howe & Underwood: A, habit; B-D, vegetative scales; E, cells from margin of thallus wing; F, female involucre; G, cross-section of female involucre showing seven wings; H, spore in distal view; I, spore in proximal view; J, spore spines from distal face; K, spore spines from proximal face. (all from VAL-Briof. 11.797). Scale bars: A, 5 mm; B, C, D, 100 μm; E, 200 μm; F, G, 500 μm; H, I, 30 μm; J, K, 8 μm.