| 21. | This rootstock is moderately susceptible to blight and collar rot.
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| 22. | Species in this section are distinguished by their cylindrical, unthickened rootstocks.
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| 23. | The rootstock should not be entirely buried in the substrate when planting.
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| 24. | Thomas Volney Munson was consulted and provided native Texan rootstocks for grafting.
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| 25. | Trees grafted on dwarfing rootstocks will bear about of fruit per year.
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| 26. | The rootstock is rhizome, the leaves are traditionally sword-shaped.
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| 27. | The species are usually herbs or shrublets with woody rootstocks.
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| 28. | The rootstock is variously described as an elongated corm or a rhizome.
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| 29. | It is a long-lived perennial herb with a tuberous rootstock.
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| 30. | This plant is perennial and grows from a woody rootstock.
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