Heterodoassansia punctiformis (G. Winter) Vánky

Synonyms

Doassansia lythropsidis Lagerh.
Doassansia peplidis Bubák
Doassansia punctiformis G. Winter
Doassansia winteriana Magnus

Description

Sori in leaves at first yellowish, later dark brown spots in which the scattered or gregarious spore balls appear as minute dark brown punctiform amphigenous elevations.

Spore balls embedded in the host tissue, 150–250 µm diam., composed of a central mass of ±firmly cohering spores surrounded by a cortex of dimorphic sterile cells.

Cortex composed of an inner layer of empty sterile cells, irregularly polyhedral, 8–20 µm long, yellowish brown, the walls 1.0–1.5 (–2.0) µm thick, prominently echinulate on the inner surface (spines up to 1 µm high); outer layer(s) of minute tangentially ±flattened cells, arranged in 1–several layers.

Spores globose, subpolyhedral, ovoid, somewhat irregular through mutual pressure, 9–15 (–16) × 8–11 (–12) µm, pale yellow; wall thin, c. 0.5 µm, smooth.

Hosts
   
Host family: Lythraceae
   
Host species: Lythrum hyssopifolium L.

Distribution

States & Territories: VIC

Comments

McAlpine (1910) included this species under the name Doassansia winteriana. In Australia, Heterodoassansia is known from only a single collection which the Australian botanist Felix Reader (1850–1911) sent to the German mycologist Georg Winter (1848–1887). McAlpine (1910) did not see the type specimens.