Mercurialis perennis
In the United Kingdom, colonies of "Helicobasidium purpureum" have been found on the living stems of dog's mercury ("Mercurialis perennis") and stinging nettle ("Urtica dioica"). The fungus is also associated as a saprobe with decaying wood and stumps of broad leaf trees. Its rhizoctonian anamorph infects the roots of carrot ("Daucus carota"), parsnip ("Pastinaca sativa"), swede ("Brassica napus ssp rapifera"), turnip ("Brassica rapa"), celery ("Apium graveolens"), asparagus ("Asparagus officinalis"), beetroot ("Beta vulgaris"), potato ("Solanum tuberosum") and sea kale ("Crambe maritima"). Wild plants on which it has been found felting the roots with purple or brown mycelium include chickweed ("Stellaria") spp., sow thistles ("Sonchus") spp., nettles ("Urtica") spp., shepherd's purse ("Capsella bursa-pastoris") and yarrow ("Achillea millefolium").