A family of extinct early vascular plants from the Devonian period, characterized by star-shaped xylem in cross-section.
From Greek aster 'star' plus xylo- 'wood' plus -aceae, the botanical suffix for plant families. Named for the distinctive star-shaped arrangement of their conducting tissues.
Asteroxylaceae are some of the earliest plants that had real woody tissue (xylem), and their fossils show a beautiful star pattern in their stems—studying them helps scientists understand how plants first conquered land about 400 million years ago!
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