Entyloma bidentis Henn.

Description

Sori in the leaves, at first whitish, later yellow to brown, visible as flat rounded to angular spots 1–5 mm diam. or larger by confluence.

Spores embedded in the leaf tissue, globose, subglobose, ellipsoidal to irregular, 10–16 × 9–14 µm, subhyaline to pale yellowish brown; contents granular; wall uniformly thick to slightly uneven, 1.0–1.5 (–2.5) µm thick, smooth.

Hosts
   
Host family:

Asteraceae

   
Host species: Bidens pilosa L.

Distribution

States & Territories: NSW, QLD

Comments

Entyloma bidentis is one of four species of Entyloma that has been reported on Bidens in the tropics and subtropics (Vánky, 2003: 5). It has often been mistaken for E. guaraniticum Speg., which has not been found in Australia. The sorus morphology serves as a good differentiating character, sori being flat in E. bidentis and bullate (cup-shaped) in E. guaraniticum.