Dermatosorus eleocharidis Sawada ex L. Ling

Synonyms

Doassansia eleocharidis (Sawada ex L. Ling) Cif.

Description

Sori in scattered ovaries, swollen, subglobose, 2.0–2.5 mm diam., at first covered by a firm thick black peridium composed of the ovary wall and a delicate layer of hyphae, which later ruptures irregularly revealing an aggregate of large dark spore balls. Columella well developed, in the centre of the sorus, composed of an indurate mass of hyphae and remnants of ovule.

Spore balls rather permanent, irregularly polyhedral, ovoid, elongate, rarely subglobose, 110–600 × 90–350 µm, deep brown, opaque, composed of a cortex of sterile fungal cells and a central mass of spores separated by small empty compartments c. 0.5–1.0 µm diam., formed by the reticulate spore wall ornamentation of the neighbouring spores. Spore balls differentiating successively from the hyphal initials massed over the columella, ripening from their distal part; loosely packed non-sporogenous hyphae surrounding the spore balls, extending from the columella just inside the ovary wall. Sporulation concluding with senescence of the host spike.

Spores globose to ovoid, 6.5–12.0 µm diam., reddish brown, loosely cohering; wall reticulate, c. 1.5–2.0 µm thick. Cortex of the spore balls rather permanent, 15–75 µm thick, consisting of several layers of firmly united dark reddish brown sterile cells 3.0–6.5 µm diam.; wall 0.5–1.0 µm thick.

Spore germination resulting in phragmobasidia with sessile basidiospores.

Hosts
   
Host family: Cyperaceae
   
Host species: Eleocharis dulcis Hensch.
Eleocharis philippinensis Svenson
Eleocharis sphacelata R.Br.

Distribution

States & Territories: NT, QLD