In "American Honey Plants" the plants are listed by common name and the latin names are also given. For Colorado they list rosin weed but say it gives low grade honey, narcissus, parsley and prairie clover, wild onion, dandelion, canteloupe, sunflowers, mentzelia, lupines, loco weed, white clematis, willow, wild currant, red gaura or ragged lady, aside alfalfa and fruit trees. As mentioned by others this is a great book!