Rotund´, round or nearly so.

Rubes´cent (rubescents, ppr. of rubescere, become red, < rubere, be red), tending to a red-color.

Rubig´inous (rubiginosus, < rubigo, rust), rust-colored.

Rufes´cent (rufescere, to become reddish), tending to rufous or a dull red color.

Ruf´fled, very strongly undulate.

Ru´fous (rufus), a brownish-red color like the pigment called Venetian-red, light red, Indian-red, red chalk, etc., which represents various shades of rufous. The typical shade is light red.

Ru´gose (rugosus, < ruga, a wrinkle), wrinkled.

Ru´gulose (rugula, dim. of ruga, a wrinkle), minutely rugose.

Run´cinate (runcina, a plane), irregularly saw-toothed, the divisions or teeth hooked backward.

Russet (russatus), a bright tawny-brown color with a tinge of rusty.