1 pair of homogamous spikelets at base of lower raceme only. 仅更低的总状花序的1对同性花的小穗在基部。
1 pair of homogamous spikelets at base of lower raceme, 2 pairs at base of upper raceme. 更低的总状花序的1对同性花的小穗在基部，上面总状花序的2对在基部。
usually 2 pairs of homogamous spikelets at base of both lower and upper raceme of pair; 通常对的更更低和上面的总状花序的2对同性花的小穗在基部；
Racemes linear, dense, spikelets imbricate, 1 to several pairs of homogamous spikelets at base of raceme below fertile pairs, fragile between fertile pairs; 线形，紧密的总状花序，覆瓦状，同性花的1到数个小穗在总状花序基部在下面能育对，在能育对之间脆；
