Finger grass and Star grass

Finger grass noun - Grasses with creeping stems that root freely; a pest in lawns.

Star grass and finger grass are semantically related. In some cases you can replace phrase "Star grass" with "Finger grass", this phrases are similar.

Star grass noun - Perennial Australian grass having numerous long spikes arranged like the vanes of a windmill.

Finger grass and star grass are semantically related. Sometimes you can use "Finger grass" instead a noun phrase "Star grass".