Stenotaphrum secundatum
The spike-like racemes of Stenotaphrum secundatum - compact and cylindrical, central axis thick, swollen and flat on one surface with hollows on other; each cavity containing 1 to 3 spikelets born alternatively on either side of a wavy midrib.
Photo by J.M. Van Staden courtesy Ecoport
(source URL: http://www.ecoport.org)