Colorado Forestry and Horticultural Association

The Colorado Forestry and Horticultural Association was an organization rather than an individual author. In material preserved online, its mission is described in practical terms: preserving Colorado's natural beauty, protecting forests, encouraging the planting and care of trees and shrubs, and sharing reliable information about horticulture and forestry suited to Colorado conditions.

The association is credited with publishing The Green Thumb, a periodical that gathered this kind of guidance for readers interested in gardening, planting, and landscape care in Colorado. That makes it best understood as a civic and educational group whose "author" role comes from organizing and issuing useful public information.

I couldn't confirm a reliable portrait of the association itself from the sources I found, so no profile image is included.