Anthoxanthum odoratum; the Sweet Vernal-grass has spike-like panicles. Its main characteristic feature though is the odor it emits (rub leaves). It has a strong sweet cumarine smell similar to that of Hily grass ( Hierochloe odorata), but can't be confused when flowering. Quite characteristic too are the long awns on the lemmas. It is a middle-sized grass (40cm tall at ripening).
It is a common grass on Iceland. It grows in many different habitats that are relatively dry.
The Sweet Vernal-grass is a member of the grass family (Poaceae, also known as Gramineae). The Icelandic name of the Sweet Vernal-grass is Ilmreyr.