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Endoraecium violae-faustiae Berndt

Description
Uredinia on phyllodes, subepidermal, erumpent pulverulent, linear or round, yellowish brown, peridium present; paraphyses cylindrical with digitate heads, subhyaline to yellow, 35‒88 × 6‒15 µm, digitate.

Urediniospores globose, subglobose, obovoid or oval, apex obtuse, yellowish brown, 28‒53 × 17‒26 µm; wall 2.5‒4.5 µm thick at sides, apex mostly 5‒10.5 µm thick, foveolate, with 3‒5 equatorial germ pores.

Telia on phyllodes, formed from uredinia, erumpent, reddish brown.

Teliospores obovoid or oval, apex rounded, 1‒4 digitate, hyaline to subhyaline, 41‒53 × 20‒28 µm; wall 1.5‒3 µm thick at sides, 5‒14 µm thick at apex, smooth, with a single persistent pedicel up to 43 µm.

Hosts
Host family: Fabaceae
Host species: Acacia aulacocarpa
Acacia crassicarpa
Acacia difficilis

Distribution
NSW, QLD

Comments
Endoraecium violae-faustiae is restricted to northern Queensland. It is distinguished from other species of Endoraecium by the foveolate urediniospores and the paraphyses that resemble thin teliospores (Berndt 2011).

Highslide JS
Endoraecium violae-faustiae on Acacia difficilis - BRIP 56545.
Scale bar = 1 cm.
Highslide JS
Urediniospores of Endoraecium violae-faustiae on Acacia aulacocarpa - BRIP 55629.
Scale bar = 10 µm.
Highslide JS
Teliospores of Endoraecium violae-faustiae on Acacia aulacocarpa - BRIP 55601.
Scale bar = 10 µm.