Plant stats requested

C. Richter richter at
Sun Oct 17 17:07:54 EST 1993

For a semi-popular article on herbs I need figures (with refs) for 
the following: 

   Estimated no. of species in plant kingdom (500,000?)

   No. of species utilized by man for any purpose, including 
   food, medicine, ornament, etc. 

   No. of species analyzed either partly or relatively throughly 
   for chemical composition.

   No. of compounds known to be found in plants.  

My latest figures for these are old (70s); recent estimates would be 

Conrad Richter

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