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Measure of plant cover
Cover-abundance is a measure of plant cover, used in phytosociology (or vegetation science). It is based on percentages at the top end, but uses abundance estimates for species with a low plant cover. Several scales of cover-abundance are used, e.g. the original 5-point cover scale of Braun-Blanquet or the Domin scale, with finer subdivisions (from simple presence through 10 grades of linked cover-abundance).