Genus and Liliopsid genus

Genus noun - One of the units into which a whole is divided on the basis of a common characteristic.

Liliopsid genus and genus are semantically related. In some cases you can replace phrase "Liliopsid genus" with "Genus", this terms are similar.

Liliopsid genus noun - Genus of flowering plants having a single cotyledon (embryonic leaf) in the seed.

Genus and liliopsid genus are semantically related. You can use "Genus" instead a noun phrase "Liliopsid genus".