| 41. | Like all ferns, tree ferns reproduce by means of spores developed in sporangia on the undersides of the fronds.
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| 42. | Derreen garden is particularly noted for its rhododendrons ( Rhododendron arboreum ) and tree ferns ( Dicksonia antarctica ).
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| 43. | The restored Cascade and exotic tree ferns all help to create a sense of wonder in the'Secret Garden '.
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| 44. | As in all the tree ferns, the ring is oblique and complete, not interrupted by the foot of the sporangium.
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| 45. | The nest is a bulky cup of plant fibres and scales of tree ferns saddled on a thin downsloping branch.
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| 46. | The main plant group is the collection of Australian tree ferns, some of which have lived here for 120 years.
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| 47. | Fern diversity is usually high in many areas, in areas where tree ferns provide a suitable substrate epiphytes also flourish.
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| 48. | There were roaring mountain brooks and, most peculiar, clearing rivers that flowed gently between banks garnished with 20-foot-tall tree ferns.
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| 49. | Cyatheaceae and Dicksoniaceae, together with Metaxyaceae and Cibotiaceae, are a monophyletic group and constitute the " core tree ferns ".
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| 50. | This is a fairly recent phenomenon, but one which may eventually have grave consequences for the tree fern ecosystem in Hawaii.
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