Fig. 8

SEM micrographs of the swirls, curving tracheids, and rays in Sample C. a SEM micrograph of the swirl in a horizontal plane at 30 mm from the tip of the chi-chi (sample C). Scale bar; 200 µm. b A wide-angle view taken in a horizontal plane at 30 mm from the tip of the chi-chi (sample C) shows several swirls contiguous to each other. Scale bar, 500 µm. c SEM micrograph of the swirl of tracheids in a horizontal plane and cross-sectioned ray at 30 mm from the tip of the chi-chi of sample C. Scale bar, 100 µm. d An enlarged image of the area outlined by the white rectangular area in (c). Tracheids with bordered pits linked uniseriate rays with cytoplasmic debris (white arrow). Scale bar, 50 µm