Phenology observations for cheatgrass (Bromus tectorum) and red brome (Bromus rubens) in the western United States

This dataset consists of phenology observations of red brome (Bromus rubens) and cheatgrass (Bromus tectorum) collected at long-term monitoring sites and using daily timelapse camera imagery in the western United States. These observations include the location and day of year that flowering or senescence was observed per species. For timelapse camera images, 'flowering' observations denote the date that 75% of individual plants in the camera viewshed had open, mature flowers, and 'senescence' observations denote dates when 75% of individuals in the camera viewshed exhibited color change of leaves.