An item to be held by a Pokémon. A light, sharp claw that lets the bearer move first occasionally.
It doesn't say it's consumeable.
An item to be held by a Pokémon. It boosts Defense on Grassy Terrain. It can only be used once.
On contrary, this grassy seed entry, does say it's single use.
Also, I've used it multiple times and it activated multiple times.
Source and experience