Phragmidium rosae-pimpinellifoliae Dietel, 1905

on Rosa

Phragmidium rosae-pimpinellifoliae: aecia on Rosa spinosissima

Rosa spinosissima, Hongarije, Budapest, Hűvösvölgy © László Érsek: all parts of the plant are set with large aecia

Phragmidium rosae-pimpinellifoliae: aecia on Rosa spinosissima

upper side of an infected leaf

Phragmidium rosae-pimpinellifoliae: aecia on Rosa spinosissima

underside of an infected leaf

Phragmidium rosae-pimpinellifoliae: aecia on Rosa spinosissima

galled flower bud

Phragmidium rosae-pimpinellifoliae

Rosa cf. canina, Belgium, prov. Namur, Saint-Servais, Asty-Moulin; © Jean-Yves Baugnée, det. Arthur Vanderweyen

Phragmidium rosae-pimpinellifoliae: aecia on Rosa pimpinellifolia

Rosa pimpinellifolia, Bergen aan Zee. Often the aecia form large lumps, but in this case they were present only as tiny specks on a gall of Diplolepis cf. eglanteriae.

Phragmidium rosae-pimpinellifoliae: aeciosopres

aeciospores

Phragmidium rosae-pimpinellifoliae: telia on Rosa pimpinellifolia

underside and upperside of two old leaves, bearing telia

Phragmidium rosae-pimpinellifoliae: telia

telia, hand-lense magnification

Phragmidium rosae-pimpinellifoliae: teliospores

teliospores

Phragmidium rosae-pimpinellifoliae: teliospore: detail of apiculus

characteristically, the spore gradually narrows into the apiculus

gall

no alternation of hostplant. Spermogonia and aecia mostly on branches or petioles, also the veins. Aecia can fuse to large lumps, without a peridium but around the margin with, in this species mostly just a few, hyaline, sausage-shaped curved paraphyses; spores produced in chains, finely spinulose. Uredinia hypophyllous, up to 0.2 mm, orange, surrounded by many paraphyses, spores single, pedicellate. Telia hypophyllous brown; spores long pedicellate, elliptic, dark brown, transversely divided into c. 6-8, finely verrucose or smooth cells, apically gradually tapering into an apiculus.

host plants

Rosaceae, monophagous

Rosa canina, dumalis, “eglanteria”, foetida, glauca, majalis, rubiginosa, spinosissima.

R. spinosissima is the most important hostplant.

references

Bahcecioglu & Kabaktepe (2012a), Buhr (1965a), Ellis & Ellis (1997a), Gäumann (1959a), Gjaerum (1986a), González-Fragoso (1925a), Helfer (2005a), Henderson (2000a), Koops (2013a), Pellicier (2001a), Petrova & Denchev (2004a), Poelt & Zwetko (1997a), Preece (2008a), Redfern & Shirley (2011a), Roskam (2009a), Sadravi, Ono, Pei & Rahnama (2007a), Termorshuizen & Swertz (2011a), Vanderweyen & Fraiture (2007a), Wilson & Henderson (1966a), Woods, Stringer, Evans & Chater (2015a).

mod 4.iv.2018