New Zealand Plants and their Story
The Lower Plants
The Lower Plants.
The seed-plants do not by any means comprise the whole of the New Zealand flora. There are, for example, more than a hundred and fifty species of ferns and their allies, including one genus, Loxsoma, peculiar to New Zealand.
Ferns differ greatly in their form and the texture of their leaves. Some possess two different kinds of leaves—namely, those which bear spores and those which do not, the latter having generally a larger area of surface. The genus Blechnum is especially distinguished by its two forms of leaves. Generally the leaf-surface is more or less vertical; but in Gleichenia it is horizontal, whence the species of that genus get the name of "umbrella-ferns" (fig. 66). To the genera Hymenophyllum and Trichomanes belong the beautiful filmy ferns. The leaves of these ferns are generally much divided, but those of the kidney-fern (Trichomanes reniforme) are entire. This fern, notwithstanding its thin leaves,* often grows in remarkably dry stations, as on Rangitoto Island, near Auckland City.
The mosses and liverworts embrace hundreds of species living under all kinds of conditions, and varying in size from the giant Dawsonia superba, 2 ft. or more tall, to tiny species of liverworts (Frulania, &c.) clinging to the bark of trees. Very interesting is the way in which both mosses and liverworts build up great cushions in stations where the air is almost constantly saturated with moisture. In the forests of Stewart Island, but chiefly in the south and west, the cushions look just like moss-covered boulders (fig. 67).†
Fig. 66.—The Umbrella-fern (Gleichenia Cunninghamii).
Lands Department.] [Photo, L. Cockayne.
Fig. 67.—Cushion of the Moss Dicranoloma Billardieri, 2 ft. 4 in. tall. Mount Rakiahua, Stewart Island.
Lands Department.] [Photo, L. Cockayne.
After the fungi come the algae, salt water and fresh. Macrocystis. a brown seaweed, attains an enormous size, and lengths of many hundreds of feet are not unknown; indeed, this plant may be the famous "sea-serpent."
Then we have the bacteria—the "microbes" of the newspapers—all infinitesimally minute plants; some the greatest of benefactors, and others the deadly enemies of mankind. And finally come the slime-fungi (Myxomycetes), which may be seen as masses of jelly on rotten wood, and which, moreover, are at one period of their existence animals, and at another plants!