Bursage, Ambrosia dumosa (32333136741)

描述：

Description: bursage, Ambrosia dumosa, California, White Mountains, Owens Valley drainage, elevation 1380 m (4520 ft). Usually co-dominant with creosote bush (Larrea tridentata) in the Mojave and Sonoran deserts, bursage extends shortly northward by itself, reaching its northernmost limits along the lowest-elevation southern margin of the White Mountains, including this location. Here the species is scattered among more than two dozen other shrub species forming a mixed desert shrubland zone just above the Mojave Desert and below the sagebrush zone. Very widely scattered (as in, miles apart) individuals of creosote bush also turn up in warmer microsites within this zone, some old enough to possibly be climatic relicts instead of recent dispersals from farther south. Date: 8 May 2016, 12:17. Source: bursage, Ambrosia dumosa. Author: Jim Morefield from Nevada, USA. Camera location37° 12′ 48.82″ N, 118° 14′ 23.46″ W View all coordinates using: OpenStreetMap 37.213561; -118.239850.