Daldinia fissa C. G. Lloyd



Colonies on 2% Difco Oatmeal Agar at ca. 20C and under 12 h fluorescent light reaching the edge of 9 cm Petri dish in 1 wk, at first whitish, floccose, azonate, with diffuse margins, becoming greenish olivaceous (90) at places; reverse uncolored. Stromata confluent, distributed at edge of colony, pulvinate to hemispherical.

Sporulating regions at edge of colony, largely confined on stromatal surface, buff (45) to vinaceous buff (86).

Conidiogenous structure highly variable, ranging from Sporothrix-like, Nodulisporium-like to Periconiella-like branching pattern as defined in Ju and Rogers (1996).

Conidiophores mostly arising from aerial hyphae on a slender, sometimes highly reduced, main axis 1.5-2 m, mononematous, unbranched or di- or trichotomously branched, sometimes with additional branches arising from the first level of conidiogenous regions, hyaline, smooth to finely roughened, with one to four conidiogenous cells arising from each terminus.

Conidiogenous cells cylindrical, hyaline, finely roughened, 8-20 x 3-4.5 m. Conidia produced holoblastically in sympodial sequence.

Conidia hyaline, smooth, subglobose to ellipsoid, with flattened base, 6.5-9(-11) x 4.5-6 m. Stromata produced in culture in 6-8 wk, with morphological features as described for naturally-occurring material, with ascomatal initials developing at stromatal periphery but never attaining full maturity.