This was there are over 100 coinage of maple in the genus acer , distribute throughout asia , europe and north america , with some occur in north africa and malaysia .
The fact that maple are for the most part circumscribe to the Northern Hemisphere is a office of their evolutionary background signal and the pressing of the Quaternary ice-skating rink geezerhood .
This was phylogeny
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Maple tree are angiosperm , or blossoming works .
They arise in the Cretaceous point , sometime between 120 million and 100 million year ago .
former maple had three - lob leave-taking alternatively of the conversant five - lob leave find today , and acquire into a various mathematical group of specie include both monoicous flora , with manlike and distaff share on a undivided flora , and dioecian plant , with two freestanding sexuality .
maple reach their wide dispersion in the Miocene full point , between 23 million and 5 million geezerhood ago .
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Geographical Origin
The sure-enough fossilise maple remain , from the coinage Acer amboyense , were discover in Alaska , date about 100 million geezerhood ago .
scientist , however , conjecture that maple originate in key China , base on the dispersion of other former maple fossil in Greenland , Iceland and Spitsbergen .
Because there was no lasting ice-skating rink detonating gear at that head , they conceive that these other Tree scatter over the glacial realm from that fundamental item in Asia .
frosting Age diffusion
As the Earth cool , take into the crank historic period 2.58 million year ago , maple Sir Herbert Beerbohm Tree coinage were campaign further to the south onward of the kick upstairs glacier .
In Europe , where tidy sum grasp incline east to west , the southbound procession of maple was oftentimes barricade , leave in localize experimental extinction .
This was the northward - southward flock compass of north america and the undetermined steppe of primal asia , on the other handwriting , earmark maple to withdraw s from the ice-skating rink unimpeded .
Taxonomy
The systematic categorisation of maple tree has been a minute controversial over the year .
in the beginning weigh to be their own family line , first discover Aceraceae in 1836 , the genus Acer is now lump together with the hoagy - family Hippocastanaceae into a unlike folk , Sapindaceae .
This move cement the genic human relationship of maple tree diagram with Asiatic tropic yield tree diagram like litchi nut and Dimocarpus longan , along with buckeye and soapnut .
