Summary[edit] Description: English: Sierra whorled penstemon (Penstemon heterodoxus) clump of flowers and leaves. Along the trail into Little Lakes Valley, John Muir Wilderness, Sierra Nevada USA. Date: 15 July 2014, 18:43:59. Source: Own work. Author: Dcrjsr. Camera location37° 26′ 16.81″ N, 118° 44′ 46.16″ WView all coordinates using: OpenStreetMap 37.438003; -118.746155.