Fig. 4

(a–k) Papillate sporangia of Phytophora boodjera formed on V8A flooded with soil extract. Ovoid to broadly ovoid (a, b, e, f, g), limoniform (d right, h) bipapillate (i) distorted and bipapillate (j) often with laterally attached sporangiophore (c, k). Branching sporangiophores were rarely observed (d), occasional constriction of sporangiophore near base of sporangia (e), or bulbous sporangiophore (f). Hyphal coils rarely observed (l). Oogonia of P. alticola nom. dub. isolate CMW34279 with tapering bases, wavy margins and turning golden brown at maturity, with aplerotic oospores and paragynous antheridia (m–q). Aplerotic oospores of P. boodjera with paragynous antheridia (r–v). Scale bar = 20 µm.