31. The staminate ( male ) flowers occur in clusters at the upper nodes of the inflorescence. 32. There are no ray flowers, but many disk flowers which are either staminate or pistillate. 33. The inflorescences are round and head-like; they contain both pistillate and staminate flowers. 34. In which case they may be either male ( staminate ) or female ( pistillate ). 35. Leaves are arranged in staminate flowers and female individuals producing solitary flowers at the leaf axils. 36. The sterile staminate flower is similar to the fertile but is slightly contorted with empty anthers. 37. The staminate flowers are tiny with a tubular calyx divided into three hairy, triangular lobes. 38. Staminate plants have up to 20 flowers per spikelet, pistillate plants only 5-9.39. The inflorescence usually has staminate spikes. 40. The inflorescence contains separate staminate spikes.
