undulatifolius v. undulatifolius is a perennial herb of
10-30cm tall with slender stems; the stem's bases crawl long
underground, branch, and extend obliquely upward. Leaves are broad
lanceolate, 3-7cm long, 1-1.5cm wide, with tips pointed, margins
somewhat wavy, surfaces with dense short hairs, bases with long wavy
hairs, and thick divaricate hairs on leaf sheaths. Inflorescences
with thick divaricate coats emerge 6-12cm long and 6-10 short
branches with several spikelets. Bloom time: August-October.