TY - RPRT TI - Phloem evolved gradually and asynchronously to xylem in early vascular plants AU - Cooper, L. M. AU - Hetherington, A. J. PY - 2026 DO - 10.64898/2026.03.23.713640 UR - https://www.biorxiv.org/content/10.64898/2026.03.23.713640v1 ID - 10.64898/2026.03.23.713640 ER -