Yellow oatgrass

Trisetum flavescens is a perennial bunchgrass growing in clumps up to 60–80 centimetres (24–31 in) tall, and known to exceed 1 metre (3.3 ft) at times.

The inflorescence is a narrow panicle which is greenish yellow to purple when new and ages to bright golden yellow.

The grass is susceptible to yellow oat grass mosaic virus (YOgMV), a virus of genus Tritimovirus