Bromus tectorum is totally displacing all herbaceous vegetation on the upper slope edge of barren - only has a secure hold on moderate slopes and not on the steep shale slopes of the barren. "As seen elsewhere.";Very steep shale barren woodland codominated by Pinus virginiana and Quercus prinus. Substrate varies from shale bedrock outcrop to mostly very loose fissile shale. Herb and shrub richness are very poor although occasional patches of Rhus aromatica and Carex pensylvanica occur.