Aside from Mark Trail’s Sunday props to our woodland chums, the comics page would appear to give little thought to the great outdoors. Not so, according to Joachim Wolschke-Bulmahn. In “Donald Duck, the Master Landscapist: Gardening, Landscape Design, and Environmental Issues in Comic Strips,” the Dumbarton Oaks Director of Studies in Landscape Architecture peers beneath the garish surface of cartooning to tackle his hidden concerns. If he’ll entertain animated issues as well, perhaps the Oaks’ W.-B. will take on the Beatrix Farrand of the open road, Speed Racer, who thought nothing of sacrificing acres of forest to the ideal of free passage and the buzzsaws of his powerful Mach 5. The illustrated lecture starts at 5:30 p.m. at Dumbarton Oaks, 1703 32nd St. NW. FREE. (202) 339-6410.