Assertion: milkweed's leaf | /r/HasProperty | 2 per node
Facets:
Source sentences:
text: Stems erect, 1-2m (3-6½ft) high, stout, unbranched or sometimes with 1 or 2 branches near the top, usually several stems close together from the underground root system; leaves opposite (2 per node) or whorled (3 or more per node), oblong with a rounded or tapered base and a rounded to somewhat pointed tip, without teeth, underside covered with fine velvety hair, upper surface usually without hair and deeper green.