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New shoots of some of the larger species can grow over 1 meter per day.
In bamboo (finally!) the growth is like the extending of a telescope: There is a sort of crown which rises with the interior of the stem (culm) where the cell division takes place. The diagram on p3 of thie link below shows it well....sorry, you cannot view external links. To see them, please
REGISTER or LOGINThe rate of growth is down to the genetic differentiation in cell division between the species. Thats the how. The why is perhaps a little easier. Species tends to inhabit environments into which they are best suited. Not all bamboos are so fast growing, becsuse they don't need to be due to the availablilty of resources, usually light. In the case where bamboo does grow tall, it is because it competes will in that given environment for light, where the canopy is rather higher. If through evolution, you are a grass that can grow 100ft in a year, replicate through rhizomes, and be successful, then this is what you do!
Interesting math George. 365x50 plus the odd leap in there makes that approx (365*38)*1 + (366*12)*1= 18262mFlying, air travel would become interesting. Would probably be a bit like kelp diving ~ only a LOT faster