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Many varieties of the rattan palm grow luxuriantly in the forests of Borneo, some attaining a length of 150 to 200 feet. It is a creeper which makes its way towards the light, suspending itself to branches and twigs by means of the curved spines which prolong the midribs of the leaves.
What a stomach, working continuously day and night! It is a devouring laboratory, through which the foodstuffs merely pass, transformed at once. I serve up to my caged herd a bunch of leaves picked from among the biggest: two hours later, nothing remains but the thick midribs; and even these are attacked when there is any delay in renewing the victuals.
Rubrinervis is a mutation from Lamarckiana, chiefly distinguished by red midribs in the leaves and red stripes on the sepals. When propagated from self-fertilised seed it produced about 95 per cent. of offspring with the same characters, and the remaining 5 per cent. mutants, one of which was laevifolia which had been found by De Vries among plants growing wild at Hilversum.
Each of these tiny side feathers has its own midrib that tapers from base to tip, and each of these midribs carries its own equipment of side 'hairs' so beautifully constructed that it locks automatically into the one on each side of it in such a way that it makes a solid yet flexible mass of the whole surface, against which the air flows as the bird flies.
It is cultivated like spinach, and the green, tender leaves are prepared exactly like this vegetable. The midribs of the full-grown leaves may be cooked like celery. Pour boiling water over the tomatoes; remove the skins; cut into small pieces and place in a saucepan over the fire.
Besides the plants already described, Bignonia unguis and its close allies, though aided by tendrils, have clasping petioles. We now come to a small section of plants which climb by means of the produced midribs or tips of their leaves. LILIACEAE. Gloriosa Plantii.
It consists generally of three branches; and these, although much elongated, evidently represent the petioles and midribs of three leaflets; for they closely resemble the same parts in an ordinary leaf, in being rectangular on the upper surface, furrowed, and edged with green. Moreover, the green edging of the tendrils of young plants sometimes expands into a narrow lamina or blade.
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