Gymnosporangium torminali-juniperini Fischer, 1910

on Sorbus

gall

The slender, acute peridia, not fraying at their tip, are characteristic. The aecia closely resemble those of Gymnosporangium cornutum, but the size of the aeciospores is somewhat different: 18-24 × 24-27 µm, rather than 16-25 × 21-29 µm in cornutum.

spermogonia, aecia

Rosaceae, monophagous

Sorbus aucuparia, chamaemespilus, domestica, hybrida, latifolia, mougeotii, torminalis.

Mainly on S. torminalis


on Juniperus

gall

only telia, semiglobular, up to 2 mm high, on the needles, light brown when dry; spores two-celled, 21-30 x 35 µm, with mostly one germination pore per cell, capped by a hyaline papilla.

telia

Cupressaceae, nauw monophagous

Juniperus communis s.str.

references

Brandenburger (1985a: 31), González-Fragoso (1925a), Helfer (2005a), Klenke & Scholler (2015a), Kruse (2019a), Poelt & Zwetko (1997a).

mod 1.ix.2019