This is the very popular sand bar that the folks go with their boats and kayaks. The tide can get low enough to just drop anchor and people grill out and relax all weekend long out here. Heather and I have yet to do it but once I get my boat license I can rent boats cheap at the Marine Corp Base... all we need is some visitors to come enjoy it with us...
We saw this at our Koolau Ranch Tour and ever since we can find it all around our condo.
Here's some info on these cool WEED!
Mimosa pudica is well known for its rapid plant movement. In the evening the leaflets will fold together and the whole leaf droops downward. It then re-opens at sunrise. This type of motion has been termed nyctinastic movement. The leaves also close up under various other stimuli, such as touching, warming, blowing, or shaking. The stimulus can also be transmitted to neighbouring leaves. These types of movements have been termed seismonastic movements. The movement is caused when the leafs lose turgor pressure. Turgor pressure is the force that is applied onto the cell wall by water and other cell contents. This allows the plant to stay upright, but when it is disturbed by a stimuli, chemicals in the plant force the water to leave the cell. When this pressure is lost the result is a sagging plant. This characteristic is quite common within the Mimosaceae family. It is not known exactly why the Mimosa pudica has this feature but many scientists think that the plant uses its ability to shrink as a defense from predator. Many animals may be afraid of such a fast moving plant and would rather go and eat a less active one.