| 31. | The staminate ( male ) flowers occur in clusters at the upper nodes of the inflorescence.
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| 32. | There are no ray flowers, but many disk flowers which are either staminate or pistillate.
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| 33. | The inflorescences are round and head-like; they contain both pistillate and staminate flowers.
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| 34. | In which case they may be either male ( staminate ) or female ( pistillate ).
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| 35. | Leaves are arranged in staminate flowers and female individuals producing solitary flowers at the leaf axils.
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| 36. | The sterile staminate flower is similar to the fertile but is slightly contorted with empty anthers.
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| 37. | The staminate flowers are tiny with a tubular calyx divided into three hairy, triangular lobes.
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| 38. | Staminate plants have up to 20 flowers per spikelet, pistillate plants only 5-9.
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| 39. | The inflorescence usually has staminate spikes.
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| 40. | The inflorescence contains separate staminate spikes.
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