This is a common perennial grass in Taiwan, Miscanthus floridulus 五節芒, commonly known as silvergrass. http://tai2.ntu.edu.tw/PlantInfo/species-photo.php?code=628%20083%2002%200
They grow all over. Depending on the soil condition, some may be red but they are usually beige/yellow. This is how they look in the wild.
The unfurling of the inflorescence.
Inflorescences turn silvery as the seed sets, with the continuing flower effect of the plumes lasting well into if not through the winter.
