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Uromycladium alpinum McAlpine

Description
Spermogonia on phyllodes, amphigenous, erumpent, hemispherical, 75‒125 µm diam.

Spermatia globose or ellipsoidal, hyaline, 2.5‒5.0 × 2.0‒3.0 µm.

Uredinia on phyllodes, amphigenous, erumpent, bullate, 0.5 mm, yellowish brown.

Urediniospores clavate or cylindrical or narrowly ellipsoidal, often asymetrical or slightly curved, yellowish brown, 35‒53 × 17‒25 µm; wall 2‒3 µm thick, up to 8 µm thick at apex, densely covered in coarse conical warts with acute or rounded apices that are up to 2 µm high and 1.5 µm across base, with 3‒6 equatorial germ pores.

Telia on phyllodes, amphigenous, bullate, erumpent, about 300 µm diam., reddish brown.

Teliospores dorsally compressed, subglobose or broadly ellipsoid, reddish brown, 17‒22 × 17‒20 µm; wall 3‒4 µm thick, thickened at apex, smooth, pedicel persistent, formed in pairs, occasionally singly, on septate pedicels that bear one swollen globose or ellipsoidal vesicle 25‒40 µm diam.; pedicel hyaline, thin-walled, deciduous.

Mesospores subglobose or ellipsoidal, 18‒25 × 19‒25 µm, pale yellowish brown; wall smooth, 2.5‒3.5 µm thick.

Hosts
Host family: Fabaceae
Host species: Acacia spp.

Distribution
NSW, QLD, TAS, VIC, WA

Highslide JS
Uromycladium alpinum on Acacia macradenia - BRIP 53580.
Highslide JS
Uromycladium alpinum on Acacia macradenia - BRIP 53580.
Scale bar = 1 cm.
Highslide JS
Telia and uredinia of Uromycladium alpinum on Acacia macradenia - BRIP 53580.
Scale bar = 5 mm.
Highslide JS
Spermogonium of Uromycladium alpinum on Acacia leucoclada subsp. argentifolia - BRIP 14168.
Scale bar = 100 µm.
Highslide JS
Urediniospores of Uromycladium alpinum on Acacia macradenia - BRIP 53580.
Scale bar = 10 µm.
Highslide JS
Teliospores of Uromycladium alpinum on Acacia leucoclada subsp. argentifolia - BRIP 14168.
Scale bar = 10 µm.