Hypomyces papulasporae  

Anamorph: mycelium white, cottony, spreading from the fertile portion of the host ascoma down to the base of the stipe. At first producing infrequently branched, hyaline, conidiophores 40-100 µm long, each bearing a single terminal, straight, smooth conidiogenous cell (19-) 28-47 (-67) µm long that tapers evenly from 2-3 µm basally to ca 1 µm apically, producing a single conidium from the undifferentiated tip. Conidia (8-) 12-17 (-21) x (3-) 3.5-5 µm, cylindrical to ellipsoidal with a protuberant, flattened, sometimes refractive basal abscission scar, aseptate, eguttulate or with one circular guttule at each end, hyaline.
Papulaspora chlamydospores eventually arising in the aerial mycelium, often at the base of conidiophores giving the mycelium a tan, powdery aspect; produced singly on lateral branches of vegetative hyphae. Chlamydospores forming from swollen hyphal tips, short lateral branches arising from and wrapping around the swollen tip cell, cells of enveloping hyphae becoming globose and eventually producing a ball of cells (16-) 20-25 (-30) µm diam, comprising a globose, thick-walled, lightly pigmented, multiguttulate central cell (11-) 12-16 (-20) µm diam. in size, surrounded by an indefinite number of globose, thin-walled, lightly pigmented, eguttulate cells 7-15 µm diam., and a basal stalk cell.
Teleomorph: ascomata perithecia, forming after cessation of conidial production directly on the hymenium of the host without any obvious subiculum or stroma, forming a continuous layer, 125-410 µm high x 125-290 µm diam., pyriform, non-papillate or with a short, acute papilla, hyaline to pale yellow, smooth, collapsing by lateral pinching, nearly hyaline in KOH or lactic acid. Peridium 10-15 µm thick, cells in longitudinal section elliptical, 5-7 µm long x 2-3 µm wide, thin-walled; cells around the ostiolar area arranged in a thick mantle, 8-13 µm in greatest dimension. Ostiolar canal periphysate. Interascal tissue absent. Asci (69-) 82-122 (-135) x (3-) 4.5-5 (-6) µm, cylindrical, the apex with a minute ring, 8-spored. Ascospores uniseriate with overlapping ends or partly biseriate, (12-) 13.5-16.5 (-18) x (2.5-) 3-3.5 (-5) µm, fusiform to naviculate with the apical end somewhat more pointed than the basal end, aseptate, smooth, hyaline, without a perispore, gelatinous sheath or appendages.