covered with very short hairs resembling a whitish mealy dust.
resembling or yielding flour
• (a.) Yielding farinaa; as, farinose substances. • (a.) Civered with a sort of white, mealy powder, as the leaves of some poplars, and the body of certain insects; mealy.
covered with a mealy or whitish powdery substance
covered with a mealy or whitish powdery substance
With a whitened, mealy-textured surface.
Far`i·nose' adjective [ Latin farinosus : confer French farineux .] 1. Yielding farina; as, farinose substances. 2. (Bot. & Zoology) Covered with a sort of white, mealy powder, as the leaves of some poplars, and the body of certain insects; mealy. 
a texture - see photo link