Puccinia petasites-poarum Gäumann & Eichhorn, 1941

on Petasites

gall

Apart from the host plant not distinguishable from Puccinia poarum.

spermogonia, aecia

Asteraceae, monophagous

Petasites albus, hybridus, kablikianus, paraddoxus.


on Poa

gall

uredinia mainly epiphyllous, rust-coloured, often with a number of clavate or capitate paraphyses; spores 18-21 x 22-25 µm with 6-8 indistinct germination pores. Telia epiphyllous, small, black, long covered by the epidermis, divided into small sections by many brown, capitate paraphyses; spores two-celled, 17-23 x 53-60 µm, wall smooth, pedicel short, brownish, persistent.

uredinia, telia

Poaceae, narrowly monophagous

Poa alpina, nemoralis, palustris

references

Brandenburger (1985a), Buhr (1965a), Gäumann (1959a), Klenke & Scholler (2015a).

21/12/2016

mod 16.vii.2017