how many stomata present in the upper and the lower side of a lily leaf???

Dear student,        
​Please find below the solution to the asked query                                                                                                                                   

Water lily is an aquatic plant, hence stomata are only present on the upper epidermis. Exact number of stomata in Water Lily is not known.
For calculating the number of stomata, peel of Lily is taken, stained and observed under microscope. After counting number of stomata and surrounding epidermal cells in one field of microscope, following formula is applied:
Stomatal index (S.I.) = No. of stomata/ no.of stomata + no. of epidermal cells x100.

S.I. gives an idea of number f stomata and their distribution.

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