Saturday, July 13, 2013
Henry Nicholas Ridley, the botanist credited with introducing rubber to this part of the world, once thought that this species was the same as A. variabilis from Indonesia. Its distinguishing feature - the elongated tuber, was thought to be the result of being confined between limestone cracks and crevices. As you can see from the habitat photo below, the plant is not necessary restricted to the limestone cliff but the tubers are characteristically long nonetheless. As they age, the tubers will extend deeper and deeper into ground and they are really hard to dig up without being broken in pieces.