But the most famous rata is neither the vine nor the tree of the south. It is the tree-killing tree of the North Island, the species named _robusta_. Its flowers are richer than the southerner’s, and whereas the latter is not often more than fifty feet high, _robusta_ is sometimes twice as tall as that. And it is as strong as tall, for its hard, heavy logs of reddish wood will lie on the ground year after year without decaying. But its fame comes from its extraordinary fashion of growing. Strong and erect as it is, and able to grow from the ground in the ordinary way, it prefers to begin life as an epiphyte, springing from seed dropped in a fork or hollow of a high tree. At any rate the tallest and finest specimens begin as seedlings in these airy nests. Thence without delay they send down roots to earth, one perhaps on one side of the tree trunk, one on the other. These in their turn, after fixing themselves in the ground, send out cross-roots to clasp each other--transverse pieces looking like the rungs of a rope-ladder. In time oblique rootlets make with these a complete net-work. Gradually all meet and solidify, forming a hollow pipe of living wood. This encloses the unhappy tree and in the end presses it to death. Many and many a grey perished stick has been found in the interior of the triumphant destroyer. In one tree only does the constrictor meet more than its match. In the puriri it finds a growth harder and stouter than itself. Iron is met by steel. The grey smooth trunk goes on expanding, indifferent to the rata’s grasp, and even forcing its gripping roots apart; and the pleasant green of the puriri’s leaves shows freshly among the darker foliage of the strangler. The rata itself, on gaining size and height, does not escape the responsibilities of arboreal life. Its own forks and hollows form starting-points for the growth of another handsome tree-inhabitant, the large or shining broadleaf. Beginning sometimes thirty feet from the ground, this last will grow as much as thirty feet higher, and develop a stem fourteen inches thick. Not satisfied with sending down roots outside the trunk of its supporter it will use the interior of a hollow tree as a channel through which to reach earth. The foliage which the broadleaf puts forth quite eclipses the leaves of most of the trees upon which it rides, but it does not seem to kill these last, if it kills them at all, as quickly as the iron-hearted rata. [Illustration: NIKAU PALMS]