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Confessions of a Beachcomber

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in her least conspicuous moods, Nature is as consistent and as wonderful as when in her exuberance she carpets a continent with flowers, and when all the forests of a country, at her bidding, don a mantle of yellow. To exaggerate any of her methods were needless. She is never ugly, for in her seemingly forbidding moods she wears a smiling face. The smiles may not be apparent to all, but they are there for those who expect and look for them. Let a mangrove swamp be taken as an illustration of an untoward aspect of Nature, and see whether among the apparent confusion, and the mud and slime and the unpleasant odours, there are not many proofs of good humour, kindly disposition, real prettiness, and orderly and systematic purpose. On the deltas and banks of all the rivers and creeks of North Queensland and on many of the more sheltered beaches, the mangrove flourishes, that ambitious tree which performs an important function in the scheme of Nature. Its botanical title reveals its special character--Rhizaphora. Very diverse indeed are the means by which plants are distributed. While some are borne, some fly and others float. The mangrove is maritime. While still pendant from the pear-shaped fruit of the parent tree, the seed, a spindle-shaped radicle, varying in length from a foot to 4 feet, germinates--ready to form a plant immediately upon arrival at a suitable locality. A sharp spike at the apex represents the embryo leaves ready to unfold, while the roots spring from the opposite and slightly heavier end. The weight is so nicely adjusted that the spindle floats perpendicularly or nearly so, when owning a separate existence from the parent tree, it drops into the water, and begins its remarkable career. It has been suggested that the viviparity of the mangrove is a survival of a very remote period in the development of the earth--that a mangrove swamp represents an age when the earth was enveloped in clouds and mist; and that with the gradual decrease in tepid aqueous vapour the viviparous habit, then almost universal, was lost, except in the case of this plant. Other plants, however, exhibit the characteristic. Notably one of the handsomest of the local ferns (ASPLENIUM BULBIFERUM) which, with motherly solicitude, detains its offspring until they are not only fully developed but are strong and lusty. As the fronds die they incline earthwards, each weary with the burden of a new and virile generation--some of which float down stream to foreign parts, some create a colony round the parent. This fern demands conditions similar to the mangrove--water, heat and humidity--and might be quoted in support of the theory which gives unique interest to a mangrove swamp. Whole battalions of living mangrove radicles fall into the rivers during February and March. Out at sea miles from the land you may cross the sinuous ranks of the marine invaders--a disorderly, planless venture at the mercy of the wind and waves. Myriads perish, hopeless, waterlogged derelicts, never finding foothold nor resting-place. But thousands of these scouts of vegetation live to fulfil the glorious purpose of winning new lands, of increasing the area of continents. This arrogant plant not only says to the ocean, "Hitherto shalt thou come, but no further; and here shall thy proud waves be stayed" but unostentatiously wrests from it unwilling territory. Plants like animals require "food convenient for them," certain constituents of the soil, certain characteristics of environment, that they may flourish and fulfil their purpose. This delights in conditions that few tolerate--saline mud, ooze and frequent flooding by the salt sea. Drifting into shallow water the sharp end of the spindly radicle bores into the mud. At once slender but tough roots emerge in radiating grapples, leaves unfold at the other extremity, and the plan of conquest has begun. During the early period of its life there is nothing singular in the growth of the plant In a few months, however, it sends out arching adventitious roots, which on reaching the mud grasp it with strong finger-like rootlets. These arching roots, too, send out from their arches other roots that arch, and the arches of these similarly repeat themselves, and so on, until the tree is underpinned and supported and stayed by an elaborate and complicated system, which while offering no resistance to the sweep of the seas, upholds the tree as no solid trunk or stem could. Then from the plan of arches spring offshoots, in time to become trees as great as the parent. Aerial roots start a downward career from the overhanging branches, anchoring themselves in the mud. Some young seedling drops and the pointed end sticks deep in the mud, and grows forthwith, to possess arching and aerial roots of its own, and to make confusion worse confounded. The identity of the original founder of the grove is lost in the bewildering labyrinth of its own arches, offshoots, and aerial roots, and of independent trees to which it has given the mystery of life. One floating radicle with its pent-up energy, having after weeks of drifting and swaying this way and that to the slightest current and ripple, grapples Mother Earth and makes a law to the ocean. Among the interlacing roots seaweed, sodden driftwood and leaves lodge, sand collects, and as the level of the floor of the ocean is raised the sea retires, contributing by the flotsam and jetsam of each spring-tide to its own inevitable conquest. Not to one plant alone is the victory to be ascribed. As in the army there are various and distinct branches of service, so in this ancient and incessant strife between land and water, the vegetable invaders are classified and have their appointed place and duties. Neither are all the constituents of a mangrove swamp mangroves. In the first rank will be found the hardiest and most highly specialised--RHIZOPHORA MURCRONATA, next, BRUGUIERA GYMNORRHIZA (a plant of slightly more lowly growth but prolific of arching and aerial roots); BRUGUIERA RHEEDI (red or orange mangrove.) Some of the roots of the latter spread over the surface and have vertical kinks. The roots and the accessories act as natural groynes, causing the waves to swirl and to precipitate mud and sand. BRUGUIERA PARVIFLORA and CERIOPS CANDOLLEANA assist in the general

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