Stilbohypoxylon quisquiliarum (Mont.) J. D. Rogers & Y.-M. Ju

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

CULTURES AND ANAMORPH

Colonies from multiple ascospores on 2% oatmeal agar (Difco) incubated at 20°C under 12 h fluorescent light covering 9 cm diam Petri dish in 3 wk, at first white, velvety, appressed, zonate, with plumose margins, then becoming overlain with radiating yellowish and olivaceous hyphae. Reverse tan.

Synnemata scattered, cylindrical, with subglobose to spherical heads, dark olivaceous to blackish, 0.5-0.8 mm long x 0.5 mm diam, on short, villose, yellow stalk, up to 1 mm high x 0.2-0.3 mm broad.

Sporulating regions on the entire surface of synnematal heads.

Conidiophores in dense, brownish palisades, dichotomously branched several times from bases.

Conidiogenous cells terminal, cylindrical, 10-20 x 3.5-5 mm, hyaline to pale brown, smooth, bearing lateral and terminal denticulate conidial secession scars, 0.5-1 mm diam x 0.5 mm high. Conidia produced holoblastically in sympodial sequence.

Conidia yellowish to pale olivaceous, smooth, obovate, 9.5-11.5 x 4.5-5.5 mm, with flattened base 1.5-2 mm broad indicating former point of attachment to conidiogenous cell, often bearing hyaline, roughened sheath.