Species within a genus

petra, = a rock, crag, stone;
-eus, = indicates material or colour or resemblance in quality.
(growing among rocks)
(ld, BL)

specio, = to look, look at, behold;
species, = the outward appearance, exterior; shape, form, figure, mien;
-osus, = indicates abundance or full or marked development.
speciosus, = good looking, showy, handsome, brilliant.
(showy, splendid)
(ld, BL)