Puccinia freycinetiae

Detailed description

Cinnamon-brown pustules (uredinia) occur mainly on the lower (abaxial) surface of leaves. They are pulverulent (powdery) and up to 0.75 mm long. The urediniospores are (25–)27–33(–40) x 22–25(–27) µm, globose or broadly ellipsoidal, golden to cinnamon-brown. The spore wall is echinulate and 2.5-3 µm thick. Each spore has 2–3 equatorial germ pores, with inconspicuous caps. The telia are similar to the uredinia and arise from the same sori. They are blackish-brown. The teliospores are (32–)36–45(–50) x (15–)17–20(–21) µm, 2-celled, and constricted at the cross wall. They are golden-brown apically, paler basally, with the upper cell subglobose or ellipsoidal, and the lower cell obovoid or ellipsoidal. The walls are smooth, and 0.5–1 µm thick at the sides and 4–8(–10) µm at the apex. Each teliospore has a persistent basal pedicel that is pale brown, up to 25 µm long and 5–7(–12) µm wide.