| 21. | It grows in mountainous habitat on ultramafic rock substrates, often in serpentine soils.
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| 22. | The species has an affinity for serpentine soils.
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| 23. | Increased nitrogen increases the fertility of serpentine soils, soils naturally low in nitrogen.
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| 24. | This plant is limited to serpentine soils in the Klamath Mountains of southern Oregon.
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| 25. | It is not unusual to find species that specialize in growing on serpentine soil.
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| 26. | The low Ca : Mg ratios is the main plant limiting factor in serpentine soils.
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| 27. | The tree can grow on serpentine soils.
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| 28. | It is also endemic to serpentine soils.
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| 29. | It is sometimes grows on serpentine soils.
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| 30. | It has an affinity to serpentine soils.
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