Schroeteriaster alpinus (Schroeter) Magnus, 1896

on Ranunculus

gall

Spermogonia honey-coloured in up to 8 mm large groups on swellings of the upperside of the leaves and the petioles. Aecia colourless on strongly galled spots at the underside; spores with ± 3 µm large, plate-like, easily detachable appendages.

spermogonia, aecia

Ranunculaceae, monophagous

Ficaria verna; Ranunculus alpestris, lanuginosus, montanus, polyanthemos subsp. serpens, repens, villarsii.


on Rumex

Schroeteriaster alpinus: telium, urediniospores

Rumex alpinus, from González-Fragoso (1925a): telium (section), urediniospores

gall

Uredinia mainly hypophyllous, cinnamon-coloured, less than half a mm; urediniospores with four pores. Telia hypophyllous as well, less than a mm, light to dark brown, permamently covered by the epidermis, looking waxy or gelatinous; below the epidermis lie ± barrel-shaped, smooth, thin-walled teliospores in several (maximally 5) layers.

uredinia, telia

Polygonaceae, monophagous

Rumex alpinus, crispus, obtusifolius, sanguineus.

synonyms

Uromyces alpinus Schröter, 1887.

references

Brandenburger (1985a: 90, 152), Buhr (1965a), Klenke & Scholler (2015a), Gäumann (1959a), González-Fragoso (1925a), Schmid-Heckel (1985a), Zwetko & Blanz (2012a).

24/04/2017/p>

mod 16.vii.2017