Trachyspora melospora (Therry) Dietel, 1923

on Alchemilla

gall

No host plant alternation, no spermogonia or aecia. In fact no uredinia either: the few orange urediniospores are formed in the telia. Telia extensive, mainly hypophyllous, rust coloured. Teliospores one-celled, brown, coarsely verrucose, pedicel with a septum, where the pedicel breaks off; the size is (19)26-30(37) x (23)27-32(45) µm.

hostplants

Rosaceae, narrowly monophagous

Alchemilla alpigena, alpina, hoppeana, indivisa, nitida, velebitica.

synonyms

Uromyces alchemillae-alpinae Fischer, 1894.

The form on Alchemillae pentaphyllea has somewhat larger teliospores, and because of that has been described as a separate species, Trachyspora pentaphylleae. Klenke & Scholler consider pentaphylleae a valid species, Helfer considers it a mere variety of melospora.

references

Brandenburger (1985a), Buhr (1964b), Gäumann (1959a), González-Fragoso (1925a), Helfer (2005a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Poelt & Zwetko (1997a), Termorshuizen & Swertz (2011a).

22/04/2017

mod 22.xi.2017