140 



Fig. 109. Korycarpus diandrus (Michx.) Kuntze. {Diarrhena americana 

 Beauv.). — a, A spikelet; b, the outer empty glumes of the same; c, a floret; d, the 

 pistil and lodicules. 



109. KORYCAKPTJS Zea, Act. Matrit. 1806. (Diarrhena Beauv. 1812.) Spike- 

 lets 3- to 5-flowered; rachilla articulated above the empty glumes and between 

 the florets; lower florets perfect, the uppermost 1 or 2 sterile. Empty glumes 

 unequal, ovate, awnless, shorter than the florets; flowering glumes broader, 

 subcoriaceous, rounded on the back, smooth and shining, 3-nerved, acuminate 

 or mucronate-pointed. Palea rather broad 2-keeled. Stamens 2, or rarely only 

 1. Styles short, distinct; stigmas plumose. Grain large, usually exceeding the 

 palea and glume, obliquely ovoid and obtusely pointed. 



Nearly smooth perennials with simple culms from a creeping rootstock, flat 

 leaves and few-flowered terminal panicles. 



Species 2, one in Japan, the other in Eastern North America. 



