sprangle-top

from The Century Dictionary.

• noun The grass Scolochloa festueacea, found in wet places from Iowa and Nebraska northward. It is a stout, erect, smooth perennial with a large open panicle, not possessing marked value.
• noun A grass, Diplachne dubia, found in the southwestern United States, in Mexico, and in southern Florida. Its panicle consists of 8 or 10 spreading spikes.