False oat grass?

False oat grass?

Observation - False oat grass?. Description: Neutral/calcareous soil. Appears to be very variable in the field. All photos are examples of same species? Have rough, hairless leaves and hairless, keeled lower leaf sheaths.

Neutral/calcareous soil. Appears to be very variable in the field. All photos are examples of same species? Have rough, hairless leaves and hairless, keeled lower leaf sheaths.