Caeoma epilobii-alpini Jørstad, 1922

on Epilobium

gall

Spermogonia golden yellow, epiphyllous, dispersed, 0.2 mm. Aecia hypophyllous in circles on, 1-2 mm large, bright yellow leaf spots; they are flat, without a clear margin; colour not stated, probably yellow to orange. The spores are globular, 15-5 ø, densely verruculose.

hostplants

Asteraceae, narrowly monophagous

Epilobium alsinifolium, hornemanni, lactiflorum, nutans, palustre (= alpinum).

notes

Scandinavian species. The ultimate part of the life cycle of the species is unknown; Gäumann supposed that it is a Melampsora species, alternating with Salix. Check here about the the genus Caeoma.

references

Brandenburger (1985a), Gäumann (1959a), Klenke & Scholler (2015a).

03/12/2016

mod 30.vii.2017