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. 2023 Jul 10;132(5):929–948. doi: 10.1093/aob/mcad093

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Fig. 6. — Cross-sections of Urvillea species showing lobed stems without and with stem splitting (ontogeny 4). (A) Urvillea stipitata, three-lobed stem (light microscopy); stem splitting is expected in the furrow region. (B) Urvillea chacoensis, two-lobed stem (laser ablation tomography, LATscan); stem splitting is expected in the furrows, forming a constriction zone (arrow). (C) Urvillea rufescens, three-lobed stem; stem splitting is expected in the furrows forming a constriction zone (arrow). (D) Urvillea stipitata, split stem; the two parts are detached and were grouped to image the stem.