Assertion: angiosperm's leaf | /r/HasProperty | attached
Facets:
Source sentences:
text: Grasses may be annual or perennial herbs,:10 generally with the following characteristics (the image gallery can be used for reference): The stems of grasses, called culms, are usually cylindrical (more rarely flattened, but not 3-angled) and are hollow, plugged at the nodes, where the leaves are attached.