Uredinia on both leaf surfaces, subepidermal, erumpent, round to ellipsoidal, up to 500 µm, yellow to yellowish brown.
Urediniospores ellipsoidal to obovoid, yellowish brown, 26-30 × 18-21 µm; wall 3-4 µm thick at sides, apex 4-6 µm thick, reticulate, with 5-6 equatorial germ pores.
Specimens cited in description:
- BRIP 57457
- Acacia mangium
McTaggart et al. (2015) determined that species of Endoraecium on Acacia were host specific and distinct from Endoraecium digitatum s. lat. A species of Endoraecium has not yet been described from A. mangium.