Asclepias curassavica and Silkweed

Asclepias curassavica noun - Tropical herb having orange-red flowers followed by pods suggesting a swallow with outspread wings; a weed throughout the tropics.

Silkweed and Asclepias curassavica are semantically related. In some cases you can use "Silkweed" instead a noun phrase "Asclepias curassavica".

Silkweed noun - Any of numerous plants of the genus Asclepias having milky juice and pods that split open releasing seeds with downy tufts.

Asclepias curassavica and silkweed are semantically related. Sometimes you can replace phrase "Asclepias curassavica" with "Silkweed", this terms are similar.