about this key identify a rust fungus browse rust fungi host index records & references  

Endoraecium peggii McTaggart & R.G. Shivas

Description
Uredinia on both phyllode surfaces, pulverulent, subepidermal, erumpent, linear to round, up to 2 mm, yellowish brown; paraphyses intrasoral, cylindrical, yellow, with pedicel, 37‒84 × 9‒10 μm, thickened at apex, digitate.

Urediniospores ovoid, apex obtuse, yellowish brown to reddish brown, 31‒45× 20‒25 μm; wall 3‒5 μm thick at sides, apex 4‒10 μm thick, foveolate to reticulate, with 2‒3 equatorial germ pores; pedicel 3‒6 μm.

Telia rare, on both surfaces of phyllode, darker than uredinia, erumpent, linear, brown to black.

Teliospores oval, apex rounded, no digitations, hyaline to subhyaline, 45‒60 × (15‒)19‒27 μm; wall 1.5‒2.0 μm thick at sides, sometimes thickened at apex, 7‒17 μm; pedicel persistent, up to 52 μm.

Hosts
Host family: Fabaceae
Host species: Acacia holoserica

Distribution
NT, QLD

Comments
Endoraecium peggii is known from A. holosericea in Juliflorae. This species of Acacia is native to northern Australia (Maslin 2013). The rust was also collected in south-east Queensland on a plant in the Mt Coot-tha Botanic Gardens. The teliospores of E. peggii lack the apical digitations found in all other species of Endoraecium, although this ornamentation is present on the paraphyses. (McTaggart et al., 2015).

Highslide JS
Endoraecium peggii on Acacia holoserica - BRIP 55602.
Scale bar = 1 cm.
Highslide JS
Endoraecium peggii on Acacia holoserica - BRIP 55631.
Scale bar = 1 cm.
Highslide JS
Urediniospores of Endoraecium peggii on Acacia holoserica - BRIP 55631.
Scale bar = 10 µm.
Highslide JS
Teliospores of Endoraecium peggii on Acacia holoserica - BRIP 55602.
Scale bar = 10 µm.