Summary[edit] Description: English: Laënnecia coulteri, Coulter's horseweed, Apache Springs Trail, Bandelier National Monument, New Mexico. Same plant as File:Laennecia coulteri flowers.jpg. Date: 12 August 2009. Source: Own work. Author: JerryFriedman. : This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Lightened, cropped, unsharp mask. Modifications made by JerryFriedman.