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Melanotaenium cingens
Nomenclature
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Family: MelanotaeniaceaeGenus: Melanotaenium
Species:
Melanotaenium cingens
SUMMARY
Sori in stems and leaves (then mostly in the midrib), extended and coalescing, covered by a layer of host epidermal tissue that splits and peels back irregularly to expose the spores. Spore mass black, firm to somewhat granular, not strongly coherent.
Ustilospores (13-) 14.5-16 (-18.5) x 10-) 11-14.5 (-16) µm, rather irregular in form, globose to subglobose or ellipsoidal, with a round to polygonal outline, dark brown, almost opaque, the wall 1.5-2 µm thick, smooth, appearing two-layered in immature spores.