Singular rhizine, Adjective rhizinate

Rhizines are structures on the undersides of lichens that people often describe as root like. I have alwasy thought they looked more alien than that. They can look like gleaming white fangs reaching out for the surface below (Xanthomendoza fallax), they can form dense fibrous mats (i.e. certain Peltigera), they can be branched or unbranched, black, white, yellow and purple, some even look like a pipe-cleaner (Physconia). They can generally be described as descending hairs of fungal hyphae which anchor a lichen to it’s substrate. When present they are always a key to identification and should be noted.
Note that Rhizines towards the edge of a lichen often are not attached to the substrate, thus beginning to look like cilia. Cilia are purely marginal rhizines will cover at least part of the true underside of a lichen.