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Endoraecium parvum Berndt

Description
Uredinia on phyllodses, subepidermal, erumpent pulverulent, linear or round, yellowish brown, peridium present.

Urediniospores globose, subglobose or obovoid, apex obtuse, yellowish brown to reddish brown, 25‒38 × (16‒)22 µm; wall uniformly 3‒4 µm thick, reticulate, with 2‒4 equatorial germ pores.

Telia on phyllodes, formed from uredinia, erumpent, linear or dome-shaped, reddish brown.

Teliospores oval, apex rounded, 1‒3 digitate, hyaline to subhyaline, 31‒60 × 13‒27 µm; wall 1‒2 µm thick, mostly thickened at apex (5‒14 µm), smooth, with persistent pedicel, up to 66 µm.

Hosts
Host family: Fabaceae
Host species: Acacia leiocalyx subsp. leiocalyx

Distribution
NSW, NT, QLD

Comments
Berndt (2011) described Enodraecium parvum from A. leioclayx and A. mangium. McTaggart et al. (2015) determined species of Endoraecium were host specific and E. parvum was most likely restricted to A. leiocalyx.

Highslide JS
Endoraecium parvum on Acacia leiocalyx subsp. leiocalyx - BRIP 57514.
Highslide JS
Endoraecium parvum on Acacia leiocalyx subsp. leiocalyx - BRIP 57514.
Scale bar = 1 cm.
Highslide JS
Urediniospores of Endoraecium parvum on Acacia leiocalyx subsp. leiocalyx - BRIP 57514.
Scale bar = 10 µm.
Highslide JS
Teliospores of Endoraecium parvum on Acacia leiocalyx subsp. leiocalyx - BRIP 57514.
Scale bar = 10 µm.