Assertion: buckwheat's leaf | /r/HasProperty | petiolate
Facets:
Source sentences:
text: Leaf is simple and petiolate, leaf blade is ovate-triangular, 2–8 cm long, and tip acuminate, leaf base is cordate or hastate, and upper leaves are small and sessile.
text: The upper leaves are perfoliate (born in the stem and around him, clasping); lower ones, however, have a petiole that joins the stem.