Dendrostoma castaneum. Sexual morph a–d ectostromatic discs and ostioles (in a ostioles breaking through covering layer) e pseudostroma in vertical section f pseudostroma in cross section g peridium in section (in 3% KOH) h–k asci l–s ascospores a, c–g, j, k, s WU 37030 = D230 b, n–r WU 37026 h, i, l, m WU 37028 = D192. Scale bars: 500 mm (a, c, d, f), 200 µm (b, e), 20 µm (g), 5 µm (h–s).