A Grammatical Dictionary of Botanical Latin

rubiginosus,-a,-um (adj.A), rubigineus,-a,-um (adj.A), also robiginosus,-a,-um (adj.A): rubiginose, rubiginous; rusty-red; “brown-red; a term usually employed to denote a surface whose peculiar color is owing to glandular hairs” (Lindley); “rust-colored, usually implying it is due to glandular hairs” (Jackson) [> L. rubigo,-inis (s.f.III), abl.sg. rubigine, q.v., the rust of metals]; see ferrugineus;

- colorem rutilantem aut rubiginosum, quae muscorum nonnullorum praesertim palustrium folia nobis ostendunt, the color rutilans (reddish-orange) or rusty-red, which the leaves especially of some marsh-dwelling mosses show us.

- color modo cinereus, modo argillaceus; sed sordide rubiginosum the color sometimes ashen, sometimes clay-colored; but also a dirty rusty-red.

- species memorabilis Leptodontio Sinensi proxima, colore rubiginoso jam primo visu distincta, a memorable species closest to Leptodontium Sinensis, immediately by the rust-red color distinguished at first sight.

Sphagnum rubiginosum: rust-red; from the Latin adj. rubiginosus, rusty, rusty-red, brownish-red from the noun rubigo, the rust of metals; a species with capitula, its branches and stem commonly colored brown-red to reddish-brown.