Assertion: spiny naiad | /r/AtLocation | north america
Facets:
value: prior to glaciation
type: TEMPORAL
Source sentences:
text: Fossil records of this plant from the midwest indicate that it was present in North America prior to glaciation, supporting debate about whether the newly discovered populations were indigenous or non-native.
text: Fossil records of this plant from the midwest indicate that it was present in North America prior to glaciation, supporting debate about whether the newly discovered populations were indigenous or non-native.