灰绿地衣环上的水珠

Macro photograph of a small circular lichen colony on weathered birch bark with one round dew bead at its edge. Detailed branching structures, soft overcast light, limited earthy palette, no artificial smoothness. Single standalone horizontal 3:2 image.

风化桦树皮上一小片圆形地衣的微距摄影，边缘有一颗圆露珠。详细分枝结构、柔阴天光、有限大地色，无人为光滑，独立横向3:2。