Assertion: sepal | /r/CapableOf | approach certain stage of refinement
Facets:
Source sentences:
text: "...we may equally well say that a stamen is a contracted petal, as that a petal is a stamen in a state of expansion; or that a sepal is a contracted stem leaf approaching a certain stage of refinement, as that a stem leaf is a sepal expanded by the influx of cruder saps".