Pin grass and Storksbill

Pin grass noun - European weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight up; often grown for forage.

Storksbill and pin grass are semantically related. In some cases you can use "Storksbill" instead a noun phrase "Pin grass".

Storksbill noun - Any of various plants of the genus Erodium.

Pin grass and storksbill are semantically related. Sometimes you can replace phrase "Pin grass" with "Storksbill", this terms are similar.