Creosphaeria sassafras (Schwein.: Fr.) Y.-M. Ju, San Martín, & J. D. Rogers

TELEOMORPH | CULTURES AND ANAMORPH | SPECIMENS EXAMINED | NOTES

CULTURES AND ANAMORPH

Colonies on 2% Difco Oatmeal Agar incubated at 20 °C under 12 hr fluorescent light covering Petri dish in 4 wk, at first white, felty, azonate, with diffuse margins and pinkish diffusible pigment, becoming overlain with a blackish gray layer of floccose hyphae. Reverse uncolored.

Stromata formed in old cultures, scattered, appressed cushion-shaped, 2-5 mm diam x ca. 1 mm high, black.

Conidium-bearing regions on surfaces of both mycelium and stromata, or in mycelial cavities.

Conidiophores dichotomously branched, with brown stipes that become paler upwards, smooth-walled, loosely arranged when arising from aerial hyphae but in dense palisades when arising from stromata and mycelial cavities.

Conidiogenous cells terminal, cylindrical, 10-22 x 2-3mm, smooth-walled, often bearing denticulate conidial secession scars, infrequently with several annellations. Conidia produced holoblastically in sympodial sequence or from percurrently proliferating conidiogenous cells.

Conidia hyaline, wet to somewhat slimy, smooth, strongly curved, (13-)15-22 x 1.5-2 mm, with flattened bases ca. 0.5 mm broad indicating former points of attachment to conidiogenous cells. Conidia germinating in culture.

Culture deposited in American Type Culture Collection.