Coleosporium petasitis (de Candolle) de Bary, 1865

on Pinus


See description under Coleosporium tussilaginis sensu lato

spermogonia, aecia

Pinaceae, monophagpous


on Petasites

Coleosporium petasitis: uredinia on Petasites hybridus

Petasites hybridus, Vreeland: uredinia

Coleosporium petasitis: uredinium on Petasites hybridus


Coleosporium petasitis: urediniospores

Petasites hybridus, Diemen: urediniospores

Coleosporium petasitis: telia on Petasites hybridus

leaf in mid-September, its underside coloured red by telia

Coleosporium tussilaginis: telia on Petasites hybridus



the teliospsores are arragned like basalt columns, on top covered by a layer of a waxy substance. Initially they are one-celled, but in the end meiosis takes place, resulting in a chain of four hapoid cells. Each one germinates under formation of a sterigma (picture above), on top of which eventually a spore will be formed (Mims & Richardson).

The uredinia and telia of Coleosporium species morphologically are indistinguishable. For pictures see for instance C. melampyri and C. tussilaginis.

uredinia, telia

Asteraceae, monophagous

Petasites albus, frigidus, hybridus, japonicus, kablikianus, paradoxus, radiatus.


Coleosporium tussilaginis f. sp. petasitis Boerema & Verhoeven, 1972


Blumer (1946a), Brandenburger (1985a: 24, 648), Gäumann (1959a), González-Fragoso (1925a), Helfer (2013), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Mims & Richardson (2005a), Poelt & Zwetko (1997a), Riegler-Hager (2014a), Schmid-Heckel (1985a), Tomasi (2003a), Tóth (1994a).


mod 15.vii.2017