NLCD BIT Annual Herbaceous Fractional
The annual only grass and forb proportion in each in 30m pixel.
Annual Herbaceous is a continuous field component including grasses and forbs whose life history is complete in one growing season. This component is primarily dominated by annual invasive species including Cheatgrass (Bromus tectorum), Medusahead (Taeniatherum caput-medusae), Red Brome (Bromus rebens), or annual mustards such as Tumble Mustard (Sisymbrium altissimum) and Tansy Mustard (Descurainia pinnata). But may contain substantial native annual herbaceous vegetation at higher elevations and in California. This component is nested within Herbaceous as a secondary component.