I want to know the answer to the following question:
What relationship proposed on the basis of morphological evidence has recently been disputed?
All the background I'm provided with is that "A close relationship between angiosperms and gnetophytes, proposed on the basis of morphological evidence, has more recently been disputed on the basis of molecular evidence that suggest gnetophytes are instead more closely related to other gymnosperms.[citation needed]". Is that enough to answer the question?