Assertion: fern's root | /r/HasProperty | equivalent
Facets:
value: to the stems
type: OTHER
value: developmentally
type: DEGREE
Source sentences:
text: The roots (bottom image) of Lepidodendrales (Stigmaria) are thought to be developmentally equivalent to the stems (top), as the similar appearance of "leaf scars" and "root scars" on these specimens from different species demonstrates.