Melampsora repentis Plowright, 1891

Orchidaceae

gall

spermogonia under the stomata. Aecia on yellow spots, without a peridium, pulvinate, often in circles, orange, 1-2 mm.

spermogonia, aecia

Orchidaceae, oligophagpous

Anacamptis morio; Dactylorhiza incarnata, maculata, majalis, sambucina; Epipactis helleborine; Gymnadenia conopsea; Neotinea ustulata;
Neottia ovata; Ophrys insectifera, sphegodes; Orchis mascula, militaris, purpurea; Platanthera bifolia, chlorantha; Pseudorchis albida.


on Salix

Melampsora repentis: uredinia on Salix repens

Salix repens, Katwijk © Koen van Zoest

gall

uredinia bright yellow, small but numerous, hypophyllous, causing yellow spots at the upperside. Paraphyses with thin stem and a well-differentiated head; the cell wall apically not strongly thickened. Urediniospores 14-18 x 16-20 µm, echinulate-spinulose. Telia usually hypophyllous, sub-epidermal, brownish; teliospores prismatic.

uredinia, telia

Salicaceae, narrowly monophagous

Salix repens & subsp. rosmarinifolia.

synonyms

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: 45), Dietrich (2016b), Güamunn (1959a), González-Fragoso (1925a), Doppelbaur & Doppelbaur (1968a), Klenke & Scholler (2015a), Kruse & Jage (2014a), Termorshuizen & Swerrtz (2011a), Unamuno (1942a).

mod 15.viii.2018