Puccinia petasites-melicae Gäumann, 1942

on Petasites

gall

Apart from the host plant not distinguishable from Puccinia poarum.

spermogonia, aecia

Asteraceae, monophagous

Petasites albus, hybridus, paraddoxus.


on Melica

gall

uredinia mostly epiphyllous, yellow, sometimes with some clavate or capitate paraphyses; spores with about 6 indistinct germination pores. Telia hypophyllous, small, black, long covered by the epidermis, divided into small sections by many brown, clavate paraphyses; spores two-celled, 19-23 x 49-55 µm, wall smooth, pedicel persistent.

uredinia, telia

Poaceae, narrowly monophagous

Melica nutans.

references

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

21/12/2016

mod 16.vii.2017