Ren´iform (ren, the kidney; forma, form), kidney-shaped.
Repand´ (repandus, bent backward), bent or turned up or back; having a slightly undulating or sinuous margin.
Rep´licate (replicatus, pp. of replicare, fold or bend back), folded back upon itself as when the margin of a cup turns outward and downward.
Resu´pinate (resupinatus, pp. of resupinare, throw on the back), attached to the matrix by the back, the hymenium facing outward; said of fungi spread over the matrix without any stem and with the hymenium upwards.
Retic´ulate, Re´tiform (reticulatus, < reticulum, a little net), marked with crossed lines like the meshes of a net.
Rev´olute (revolutus, pp. of revolvere, revolved), rolled backwards or upwards; of the margin of a pileus e.g. the opposite of involute.
Rhi´zines, Rhi´zoids (Gr—root, +), delicate filiform hyphal branches which serve to attach the sporophore to the substratum and supply nourishment.
Ri´mose, Ri´mous (rimosus, rima, a crack), cracked, full of clefts.
Rhi´zomorphs (Gr—root, + L.—forma, form), long, branching or anastomosing, rigid, root-like cords of mycelium with a dark or black exterior, often growing between the bark and timber or about and penetrating the roots of dead and living trees, produced by Agaricus melleus and various other fungi.
Rhizomor´phoid (Gr—root, + form), root-like in form.