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Kernkampella breyniae (Syd. & P. Syd.) Rajendren

Description
Uredinia mostly on lower leaf surface, subcuticular, erumpent, linear to round with a narrow purplish halo up to 200 µm wide on upper leaf surface centred on a faintly chlorotic spot up to 2 mm diam., up to 250 µm long, often aggregated in raised circular or zonate groups up to 2 mm diam., brown; paraphyses marginal, cylindrical or clavate, hyaline, yellowish brown to pale brown, 50‒80 × 7‒13 µm.

Urediniospores globose, subglobose or broadly ellipsoidal, hyaline to pale brown, 19‒25 × 16‒20 µm; wall 1‒2 µm thick, echinulate.

Telia on lower leaf surface, subepidermal, erumpent, reddish brown.

Teliospores cylindrical or obovoid, polygonally irregular in cross section, in complex discoid heads discoid heads 70‒120 µm diam., 5‒7 spores across, with conical to cylindrical hyaline appendages 15‒20 µm high with rounded ends, reddish brown, 25‒40 × 15‒22 µm diam; wall 2‒3 µm thick at sides, 4‒10 µm thick at the apex, smooth with one conspicuous germ pore.

Hosts
Host family: Euphorbiaceae
Host species: Breynia cernua
Breynia oblongifolia

Distribution
NT, QLD

Comments
Walker et al. (2006) first reported Kernkampella in Australia. Kernkampella was distinguished from Ravenelia based on an epipatella layer between the fertile spores and the hygroscopic cysts (Rajendren 1970). All species of Kernkampella occur on hosts in the Euphorbiaceae.

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Kernkampella breyniae on Breynia oblongifolia - BRIP 53637.
Highslide JS
Uredinia of Kernkampella breyniae on Breynia oblongifolia - BRIP 53637.
Scale bar = 1 cm.
Highslide JS
Telium of Kernkampella breyniae on Breynia cernua - BRIP 56909.
Scale bar = 0.5 mm.
Highslide JS
Urediniospores and paraphyses of Kernkampella breyniae on Breynia oblongifolia - BRIP 53637.
Scale bar = 10 µm.
Highslide JS
Urediniospores of Kernkampella breyniae on Breynia oblongifolia - BRIP 53637.
Scale bar = 10 µm.
Highslide JS
Teliospores of Kernkampella breyniae on Breynia cernua - BRIP 56909.
Scale bar = 100 µm.
Highslide JS
Teliospores of Kernkampella breyniae on Breynia cernua - BRIP 56909.
Scale bar = 10 µm.