American journal of botany
Lancaster, Pa. :Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens,1914-
biodiversitylibrary.org/page/47137300
Description: close up image of Lactuca canadensis WILD LETTUCE at the James Woodworth Prairie Preserve - a seed head with filiaments deployed for wind dispersal, top view, black seeds somewhat visible. Date: 12 August 2007, 20:55. Source: Lactuca canadensis WILD LETTUCE Uploaded by JoJan. Author: George F Mayfield from chicago area, USA. Camera location42° 03′ 35.02″ N, 87° 50′ 29″ WView all coordinates using: OpenStreetMap 42.059728; -87.841389.
Description: English: Lactuca canadensis - wild lettuce - James Woodworth Prairie Preserve - a seed head with filaments deployed for wind dispersal, side view, black seeds somewhat visible. Date: 12 August 2007, 20:55:32. Source: https://www.flickr.com/photos/gmayfield10/3362994394. Author: Frank Mayfield (gmayfield10).
Description: close up image of Lactuca canadensis WILD LETTUCE at the James Woodworth Prairie Preserve - a single bloom at beginning of flowering This species is featured in the soon-to-be-published book, Elusive Splendor: Wildflowers of the Tall Grass Prairie. Contact frank@black-sweater-art.com for more information. Date: 12 August 2007, 20:49. Source: Lactuca canadensis WILD LETTUCE Uploaded by JoJan. Author: George F Mayfield from chicago area, USA. Camera location42° 03′ 35.02″ N, 87° 50′ 29″ EView all coordinates using: OpenStreetMap 42.059728; 87.841389.