Gramineous plant and Herbaceous plant

Gramineous plant noun - Cosmopolitan herbaceous or woody plants with hollow jointed stems and long narrow leaves.

Herbaceous plant and gramineous plant are semantically related. In some cases you can use "Herbaceous plant" instead a noun phrase "Gramineous plant".

Herbaceous plant noun - A plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests.

Gramineous plant and herbaceous plant are semantically related. Sometimes you can replace phrase "Gramineous plant" with "Herbaceous plant", this phrases are similar.