Fig. S1.

Image analysis on Adiantum (same sample presented in Fig. 1 and Fig. 2 A and B). (A) Original experimental image, photographed with transmitted light illumination. (B) Subtraction between two consecutive images separated by 30 s, here showing a large embolism. (C) A threshold on this image allows detection of events. (D) Coloration of the event according to time elapsed. (E) Cumulated sum of the embolisms, colored according to the time elapsed. (F) Manual coloring of the orders in Adiantum; each order corresponds to a color. (G) Coloring corresponding to the orders applied on the event detected on C, using map F. See also Movie S2 for an animated illustration.