Plant Parasites of Europe

leafminers, galls and fungi

Gymnosporangium gracile

Gymnosporangium gracile Patouillard, 1902

on Crataegus, Cydonia


At this stage indistinguishable from Gymnosporangium clavariiforme.

spermogonia, aecia

Rosaceae, oligophagous

Crataegus monogyna; Cydonia oblonga.

on Juniperus

Gymnosporangium gracile: teliospores

Juniperus oxycedrus, from Gäumann (1959a): teliospores


shrubs, infected by telia of this species develop characteristic witches’ brooms. Infected branches carry over their entire length orange, 2-5 mm long and less than a mm wide telia. The spores measure 12-18 x 50-80 µm; the pedicel is extremely long.


Cupressaceae, monophagous

Juniperus oxycedrus & subsp. macrocarpa.


Mediterranean species.


Brandenburger (1985a: 29), Dauphin & Aniotsbehere (1997a), Gäumann (1959a), González-Fragoso (1925a), Helfer (2005a), Honrubia & Llimona (1982a), Klenke & Scholler (2015a), Llorens i Villagrasa (1984a).

Last modified 12.v.2023