Figure 2

Transverse sections of stems of Yiduxylon trilobum gen. et sp. nov. from Hubei. (a) Enlargement of Additional file 2: Figure S2b. Arrows 1–4 indicating parts enlarged in (c-f), respectively. (b) Stem with three primary xylem ribs, broad secondary xylem, and narrow sparganum-type cortex. Arrows 1–3 indicating parts enlarged in Figure 3 d-f, respectively. HY3-4. (c-f) Enlargement of arrows 1–4 in (a), respectively. Leaf traces in inner cortex. Scale bars = 0.1 mm (d-f), 0.2 mm (c).