Figure 5

The distribution for the percentage of ηIII in 12 Panicum ruderale and 21 Panicum miliaceum in the three counts. D1/W1 = 20 pieces of phytoliths were counted regardless of size; D2/W2 = 20 pieces of phytoliths between 125 μm and 375 μm were counted; D3/W3 = 20 pieces of phytoliths both between 125 μm and 375 μm and containing 30 single undulating patterns were counted. The distribution curves are shown on the right of the boxes. The empty squares at the center of the box refer to the mean value of each count. The red dashed lines refer to the outermost quartiles among the three counts, i.e., lower quartiles of D2 and W1, upper quartiles of D2 and W3. D refers to Panicum miliaceum; W refers to Panicum ruderale.