| 1. | They are rugulose and have a white aril ( appendage ).
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| 2. | Lemma have ribbed literal veins with rugulose and scaberulous bottom.
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| 3. | They may be smooth or rough ( rugulose ).
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| 4. | The surface is slightly rugulose ( finely wrinkled ).
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| 5. | The black seed coat is often prominently pitted, sometimes rugulose or nearly smooth.
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| 6. | Smaller furrows may be described by other terms such as rugose, rugulose, plicate, striate, etc.
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| 7. | The seed coat is dark brown to black, its surface can be dull, almost smooth, slightly striate, rugulose, or reticulate.
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