Greya enchrysa on Heuchera cylindrica

Parasite speciation

Salmon River field sites from above

Host-Parasite coevolution across a selection mosaic. Host in red; Parasite in blue

Virginie and Francois at work in the field

Greya ovipositor

Francois at FR 263 (Berg) Field site

Tetraploid seed

Greya politella on tetraploid Heuchera grossulariifolia