Confessions of a Beachcomber - Edmund James Banfield (suggested reading txt) 📗

in all her purposes, and though changeful and gay in apparel never cheap nor meretricious. A slim-shafted palm shooting through the leafy mantle, and swaying airily a profuse mass of fiery red seeds, distinctive in shape, may be the prototype of a flirt, but the flirtation which arrests attention and bewitches the beholder is also innoxious. There is nothing of the artificial about the display. The colours flaunted are true, perfect and pure, however cunningly, however boldly by their means admiration is challenged. The true lover knows too that 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 scheme, the former depending upon abutments for security instead of adventitious roots. Its radicles resemble pipe-stems, or as they lie stranded on the beach, slightly curved and with the brown tapering calyx tube attached, green snakes with pointed beads.

Surprising features are possessed by the tree known as SONNERATIA ALBA. The roots send up a multitude of offshoots, resembling woodeny radishes, some being forked, growing wrong end up. All the base of each tree is set about with a confusion of points--a wonderful and perfect design for the arrest and retention of debris and mud. Some of these obtrusive roots are much developed, measuring 6 feet in height and about 4 in. diameter.

No less remarkable is the help that the white mangrove (AVICENNA OFFICINALIS) affords in the conquest with its system of strainers. Though different in many respects from the SONNERATIA, it too has erect, obtrusive, respiratory shoots from the roots, slender in comparison, resembling asparagus shoots or rake tines (called by some cobbler's pegs) and which strain the sea, retaining light rubbish and assisting to hold and consolidate it all. Each of the plants mentioned is equipped in a more or less efficient manner for the special purpose of taking part in the reclamation of land. In some the roots descend from the branches to the mud where roots ought to grow; in others, roots ascend from the mud to the upper air, where, ordinarily, roots have no sort of business. Each possesses varying and distinct features well designed to aid and abet the general purpose.

Other species of marine plants have their duty too. That which is known as the river mangrove (AEGICERAS MAJUS)--which does not confine itself to rivers--comes to sweeten the noisome exhalation of the mud, and with its profuse white, orange-scented flowers, to invite the cheerful presence of bees and butterflies. The looking-glass tree (HERITIERA LITTORALIS), with its large, oval, glossy, silver-backed leaves and boat-shaped fruit, stands with the river mangrove along the margin farthest from the sea, not as a rearguard, but to perform the function of making the locality the more acceptable to the presence of plants which luxuriate in sweetness and solid earth. Another denizen of the partially reclaimed area of the mangrove swamp is the "milky mangrove," or river poison tree, alias "blind-your-eyes" (EXCAECARIA AGALLOCHA). In India the sap of this tree is called tiger's milk. It issues from the slightest incision of the bark, and is so volatile that no one, however careful, can obtain even a small quantity without being affected by it. There is an acrid, burning sensation in the throat, inflamed eyes and headache, while a single drop falling into the eyes will, it is believed, cause loss of sight. Yet a good caoutchouc may be prepared from it, and it is applied with good effect to ulcerate sores, and by the blacks of Queensland and New South Wales for the relief of certain ulcerous and chronic diseases; while in Fiji the patient is fumigated with the smoke of the burning wood. Several of the plants produce more or less valuable woods. BRUGUIERA RHEEDI frequently grows slender shafts, favoured by blacks for harpoon handles on account of their weight and toughness. White mangrove provides a light, white tough wood eminently adapted for the knees of boats. The seeds resemble broad beans, and after long immersion in the sea will germinate lying naked and uncovered on the scorching sand, stretching out rootlets in every direction in search of suitable food, and expanding their leathery primary leaves--even growing to the extent of several inches--while yet owing no attachment to the soil. If it were not capable of surviving and flourishing under conditions fatal to most plants it could not contribute its quota to the formation of humus favourable to the progress of the advancing hosts of tropical vegetation.

A weird and stealthy process is this invasion of the ocean, which leads to the alteration and amendment of the surface of the globe. Here, may be watched the very growth of land--land creeping silently, irresistibly upon the sea, yet with a movement which may be calculated and registered with exactitude. Having fulfilled its purpose, the mangrove suffers the fate of the primitive and aboriginal. Tyrannous trees of over-topping growth, which at first hesitatingly accepted its hospitality, crowd and shove, compelling the hardy and courageous plant to further efforts to win dominion from the ocean. So the pioneer advances, ever reclaiming extended areas as the usurping jungle presses on its rear.

Nor must it be imagined that mangrove swamps are unproductive. Fish traverse the intricacies of the arching roots, edible crabs burrow holes in the mud, and in them await your coming, and more often than not baffle your ingenuity to extricate them. Among other stalked-eyed crustaceans is that with one red, shielding claw, absurdly large, and which scuttles among the roots, making a defiant clicking noise--the fiddle or soldier crab (GELASIMUS VOCANS). Oysters seal themselves to the roots, and various sorts of shell-fish gather together--two or three varieties appear to browse upon the leaves and bark of the mangroves;