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Between 1915 and 1932, more than 100 1 m2 quadrats were established across the Jornada Experimental Range to document vegetation dynamics in the dominant grass species over time. Locations of annual grasses, forbs, and subshrubs were charted (this package) and basal area of perennial grasses and area of shrubs were charted (packages 210351001). In several cases, grasses were also measured as a point and are found in the density data, particularly if they could not be identified to species.Thirty-four quadrats were established in 1915, 8 in 1916, 14 in 1919, 3 in 1921, 2 in 1924, 17 in 1926, 21 in 1927, 2 in 1929, 1 in 1931, and 2 in 1932. Data was recorded as chart quadrat maps, in which the locations and shapes of all living plants located within the quadrat were mapped onto the data sheet. From 1915-1924 mapping was done by dividing the quadrat frame into a decimeter grid using straps and reproducing locations of plants on grid paper. From 1925-2016 mapping was done using a pantograph, a device which allows for more accurate mapping of size and location of plants (Hill, 1920). Data collection currently occurs in 5 years intervals (1995, 2001, 2006, etc) and during the fall or winter. In the past, data collection was highly variable.