Fig. 2
From: Re-study of Guangdedendron micrum from the Late Devonian Xinhang forest
Rooting systems of Guangdedendron micrum from Yongchuan (A, C, D) and Jianchuan (B, E–L) mines. A An in-situ stem with two rhizomorph axes. Arrow indicating portion enlarged in (G). B, C In-situ stems with expanded bases and rooting systems. D Two rhizomorph axes with rootlets and rootlet scars. PKUB16151. E, F Part and counterpart of a rhizomorph axis with helical rootlets and circular rootlet scars. PKUB21016a, 21016b. G Enlargement of arrowed portion in (A), showing a rhizomorph axis with rootlets and helically arranged rootlet scars. H Part of the rooting system showing rootlets. PKUB21008. I, J Rhizomorphic axes bearing rootlets and circular rootlet scars in helix. Arrows in I and J indicating portions enlarged in K and L, respectively. PKUB21009, 21010. K, L Enlargement of arrowed portions in I and J, respectively. Circular rootlet scars in helix. Scale bars: C (10 cm), E–G, J (1 cm), H (2 cm), K (5 mm), L (2 mm); diameter of the coin for scale: 2 cm (A, B, D, I)