Puccinia arrhenatheri (Klebahn) Eriksson, 1898
Berberis vulgaris, Switzerland, Wallis, Veysonnaz © Arnold Grosscurt: witches’ brooms
Berberis hispanica, from González Fragoso (1924a): section through a spermogonium, with far-protruding paraphyses
spermogonia on the entire upper surface of the first leaves. The undersides of this first foliage is also entirely covered by aecia; later in the season the aecia are less dense, standing in dispersed groups. Aecia cupulate, sometimes almost cylindrical.
The infection is systemic, and the mycelium hibernates in the branches. Many stiff erect shoots are formed, in the course of time causing conspicuous witches’ brooms.
The spermatia emit a strong floral scent, that effectively attracts insects. It has experimentally been demonstrated that these insects contribute to the cross fertilisation and thereby to the formation of aecia (Naef ao).
Berberis aetnensis, cretica, heteropoda, hispanica, integerrima, oblonga, sibirica, thunbergii, vulgaris.
on Apera, Arrhenatherum
Arrhenatherum elatius, from González Fragoso (1924a): two teliospores, an urediniospore and a paraphyse
Uredinia less than half a mm, pulverulent, rust-coloured, mainly epiphyllous, causing yellow spots at the underside of the leaf. Urediniospores with c. 10 pores. Between the spores stand capitate paraphyses. Telia are rarely formed; they are black, hypophyllous, covered by the epidermis, divided in compartments by rows of by rows of brown paraphyses. Teliospores 2-celled, ob-clavate, persistent.
Puccinia brachypodii var. arrhenatheri (Klebahn) Cummins & Greene 1966; Aecidium graveolens Shuttleworth, 1877; Aecidium magellanicum Berkeley, 1847; Puccinia magelhaenica Peyronel, 1894.
Blumer (1946a), Brandenburger (1985a), Buhr (1964b), Dauphin & Aniotsbehere (1997a), Gäumann (1958a), Gjaerum (1986a, 1987a), Gjaerum & Dennis (1976a), Gönczö & Révay (1981a), González Fragoso (1924a), Jage, Klenke, Kruse ao (2016a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kruse (2019a), Losa España (1942a), Marková & Urban (1988a), Naef, Roy, Kaiser & Honegger (2002a), Poelt & Zwetko (1997a), Saba & Khalid (2013a), Schmid-Heckel (1985a), Scholler, Reinhard & Schubert (1996a), Scholler & Schubert (1993a), Termorshuizen & Swertz (2011a), Vanderweyen & Fraiture (2011a), Woods, Stringer, Evans & Chater (2015a).