I saw this tall blade of grass along a trail the other day and was intrigued with its natural architecture. The primary stem is flat, about 2 cm wide and only 2 mm thick. The light green sections are buttresses which run between side branches to provide support. The plant reaches more than 140 cm in hight.
Olympus E-3, Sigma 105 mm f/2.8 macro; f/6.3, 1/25 sec, ISO 100