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Endoraecium tierneyi (J. Walker & R.G. Shivas) M. Scholler & Aime

Description
Uredinia on phyllodes, subepidermal, erumpent, linear, up to 0.5 mm, yellowish brown.

Urediniospores cylindrical, oval or broadly fusiform, apex obtuse, reddish brown, 26‒36 × 13‒18 µm; wall 2.0‒2.5 µm thick at sides, 4.0‒4.5 µm thick at apex, reticulate, with 4‒8 equatorial germ pores.

Telia on phyllodes, erumpent.

Teliospores subglobose, ovoid or obovoid, apex rounded, reddish brown, darker at the apex, 27‒41 × 20‒26 µm; wall 1.0 µm thick at sides, 7‒13 µm thick at apex, smooth, with a persistent pedicel, 50‒55 µm long.

Hosts
Host family: Fabaceae
Host species: Acacia harpophylla

Distribution
QLD

Comments
Endoraecium tierneyi was named in memory of John Tierney, a forestry pathologist who made many collections of interesting rust fungi in Australia. In the study by McTaggart et al. (2015), E. tierneyi was more closely related to species of Endoreacium from Hawaii, than it was to Australian species of Endoraecium. McTaggart et al. (2015) concluded Endoraecium diversified either through co-evolution with its hosts or by shifts to closely related species.

Highslide JS
Endoraecium tierneyi on Acacia harpophylla sp. - BRIP 27071.
Scale bar = 1 cm.
Highslide JS
Urediniospores of Endoraecium tierneyi on Acacia harpophylla - BRIP 27071.
Scale bar = 10 µm.
Highslide JS
Teliospores of Endoraecium tierneyi on Acacia harpophylla - BRIP 27071.
Scale bar = 10 µm.