Melampsora arctica von Thümen, 1879

Saxifraga

gall

spermogonia orange, epiphyllous, in small groups. Aecia also orange and epiphyllous, dish-shaped without a clear margin, often near the leaf tip, on yellow spots.

spermogonia, aecia

Saxifragaceae, monophagous

Saxifraga azoides, androsacea, biflora, cespitosa, exarata, geranioides, hypnoides, moschata, oppositifolia, pedemontana subsp. pedatifida, pubescens, rivularis, seguieri.


on Salix

Melampsora arctica: paraphyses, urediniospores

Salix herbacea, from González-Fragoso (1925a): paraphyses, urediniospores

gall

uredinia orange, mainly epiphyllous; spores rotund, 15-22 x 17-25 µm, finely spinulose all over; between the spores numerous capitate, 55-65 µm long paraphyses. Telia usually hypophyllous, subepidermal, brownish.

uredinia, telia

Salicaceae, narrowly monophagous

Salix breviserrata, glaucosericea, herbacea, lanata, pyrenaica, retusa.

synonyms

Melampsora alpina Juel, 1894.

M. arctica is conceived by some authors as component of one complex species with aecia on a wide range of hosts, and uredinia and telia on Salix: Melampsora epitea.

references

Brandenburger (1985a: 44, 216), Gäumann (1959a), González-Fragoso (1925a), Henderson (2000a), Klenke & Scholler (2015a), Losa Quintana (1972a), Mayor (1970a), Pellicier (2001a), Scholler & Schubert (1993a), Termorshuizen & Swertz (2011a), Woods, Stringer, Evans & Chater (2015a).

08/05/2017

mod 16.vii.2017