Oregon Semaphoregrass

Description

Pleuropogon oregonus is a rhizomatous perennial grass, producing stems up to 90 to 95 centimeters tall. The erect stems are spongy in texture. The ligule may be a centimeter long. The leaves are up to 17 centimeters long.The inflorescence is a raceme bearing 6, 7, or 8 spikelets. The spikelets are up to 4 or 5 centimeters long and stick out from one side of the raceme. The spikelets are green with a purple tinge and each contains up to 14 flowers.Flowering occurs in June and July