Orchid Species that Grow Downwards
A drying plant is in need of repotting, and, feeding to bring back the healthy colour. Leaves may be highly glossed, self-coloured, or mottled in green and grey patterning. Depending upon their life span they may he soft and papery, signed to last for just one growing season before being shed; or bard and solid, capable of living for many years, sustaining the plant through many seasons, often becoming scarred arid marked with aae. Their appearance is an indication as to whether the plant prefers Kong light or shadow.
A hard, dark green leaf will take exposure to sanlight without coming to any harm, and indeed sunlight is beneficial to the flowering of that plant, whereas a delicate soft leaf will prefer the shade, and will be easily burnt if exposed to direct sunlight. Where large pseudobulbs exist on a plant, the leaves will, more often than not, be considerably light and thin.
Smaller, almost non-existent, pseudobulbs will require heavier, more fleshy leaves to compensate. A pseudobulb may support a solitary leaf, or numerous leaves. The gigantic Grammatophyllum wallisil ‘Burnham’, one of the largest species in the world, the long sugarcane-like pseudobulbs flanked for most of their length by huge leaves.
They prevent water vapour from collecting on the surface. They are also bristly and must greatly deter marauding pests. This type of protection can also be found on the Hower stems of most paphiopedilums and a few masdevallias.
Not for them the vast evergrowing mass of splendid white roots, extending to something over a metre; rather, a few solitary roots will emerge carefully, gripping tightly to the bark surface, and growing slowly, never straying far from their basic support.
The softer the leaf, the more susceptible it is to insect pests. The very tough leathery leaves seem immune to most sucking pests such as red spider mite.
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