Assertion: milkweed | /r/HasAspect | three whorls
Facets:
value: in their floral envelope
type: LOCATION
Source sentences:
text: Milkweeds have three whorls in their floral envelope — the sepals, which are mostly small and insignificant; the petals, which usually are pushed backwards like the tail of a comet; and the protruding corona, which sets atop the petals in a distinct whorl.