Pin clover and Pin grass

Pin clover 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.

Pin grass is a synonym for pin clover. In some cases you can use "Pin grass" instead a noun phrase "Pin clover".

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.

Pin clover is a synonym for pin grass. You can use "Pin clover" instead a noun phrase "Pin grass".