one scientist Raunkiaer differentiated plants into 5 life forms...
it is also somewhat tough to remember...
so, another nasty mnemonic for this..
Pehle Chemistry Hame Correctly Teach karo..
Phanerophytes - above 10cm from ground level
Chemaephytes - below 10cm from ground level
Hemicryptophytes - occur at ground level ( eg rosette plants)
Cryptophytes - occur below ground level - eg rhizome etc
Therophytes - perennate in form of seeds...
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