SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY. SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY.
Roots of the Rock Fig Ficus sp. , which have forced their way through cracks in the rhyolite rock face & grown down to the scant soil below. Rhyolite is a fine grained volcanic rock, pictured here in the Lubombo region, Swaziland. The genus Ficus, which includes the banyans, are well known for their trunklike root system & for their ability to graft together wherever they touch. This type of root system serves more as mechanical support & anchorage than as a pathway of moisture to the crown of the tree.
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