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Puccinia cygnorum R.G. Shivas & J. Walker

Description
Telia on lower surface of leaves or stems, subepidermal, erumpent, dark brown to black.

Teliospores oval or broadly fusiform, apex rounded, 2 celled, slightly constricted at the septum, reddish brown, 36‒60 × 12‒20 µm; wall 2‒3 µm thick at sides, 5‒9 µm thick at apex, smooth, with a persistent pedicel.

Hosts
Host family: Myrtaceae
Host species: Kunzea glabrescens

Distribution
WA

Comments
Puccinia cygnorum is known on Kunzea glabrescens from near Perth, Western Australia (Makinson & Butcher, 2014) as well as on Astartea fascicularis in the Napier Botanic Gardens, on the North Island of New Zealand from where it was eradicated (Dick and Inglis 2011). Puccinia cygnorum together with Uredo xanthostemonis on Xanthostemon spp. (Walker 1983), are both considered endemic on Myrtaceae in Australia (Walker 1983, Shivas and Walker 1994).

Highslide JS
Telia of Puccinia cygnorum on stem of Kunzea glabrescens - BRIP 39996.
Scale bar = 1 cm.
Highslide JS
Telia of Puccinia cygnorum on Kunzea glabrescens - BRIP 39996.
Scale bar = 10 µm.