| 21. | The mucilage obtained from psyllium comes from the seed coat.
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| 22. | To speed up germination, soak for several hours and carefully remove the seed coat.
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| 23. | The seed is ovoid to circular, compressed, with leathery, smooth or papillose seed coat.
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| 24. | The vertically orientated seed has a brown thin seed coat covered with white hairs.
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| 25. | The brown to blackish seed coat is undulately striate.
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| 26. | Nick the hard seed coats and soak the seeds in hot water for 24 hours.
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| 27. | The seeds have hard seed coats which restrict germination.
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| 28. | The horizontal seed is orbicular or reniform, with dark brown, smooth or glossy seed coat.
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| 29. | The brownish or black seed coat can be almost smooth, finely reticulate, or minutely pitted.
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| 30. | Some plants, among them flowers like morning glory, lupine and moonflower, have rather thick seed coats.
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