poikilohydric:Figure 2. A sunfleck in a patch of Oxalis oregana. A gap in the shade exposes this
poikilohydric: Figure 2. A sunfleck in a patch of Oxalis oregana. A gap in the shade exposes this forest floor herb to full sunlight. The fleck will move across the plants as the sun moves, causing the plants to experience two widely different light environments on a short time scale (minutes). Photograph courtesy of Dr. Olle Bjorkman. -- source link