| Quillworts are spore-bearing lycophytes with grassy, spikelike leaves and are native mostly to swampy, cooler parts of North America and Eurasia. |
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| Occurring simultaneously with the slow-wave electrical activity may be fast, spikelike electrical charges. |
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| Other behavioral patterns are found in changes in skin texture, including the erection of branched or spikelike papillae and curling of the arms. |
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| Its inflorescences are generally more spikelike than crested. |
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| A cheetah digs its spikelike claws into a grassy plain in Africa. |
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