| Ray florets are much larger, with an 8-12 mm long, yellow, three-lobed, strap-shaped ligule surmounting a short corolla tube. |
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| Many groups have a ligule or small flap of tissue adaxially above each microphyll, or its homologous sporophyll. |
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| You also need to see if there is a ligule, which is the fringe of tissue on the leaf blade where it folds away from the stem. |
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| To be measured from the ligule to the tip of the flag leaf on the longest stem. |
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| Often they are much like ordinary ray flowers, except that there are two small teeth at the top of the corolla tube, opposite the ligule. |
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| Each leaf also has a ligule, similar to that of Selaginella. |
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| A large, saclike, round-to-oblong sporangium is sunk into a pit on the inner surface of each leaf base, where a small, thin structure known as a ligule also occurs. |
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| Observations are made on only the strap shaped corolla or ligule. |
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| This indicates that some of the species of Selaginella have the potential to produce more than one ligule in a single microphyll or sporophyll. |
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| Where the blade meets the culm there is a structure called the ligule. |
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