RPKUMATOPUVTES : OV.MN< IRI'EIIM.S 



liony covering, 



transforms the integument into a hard 



known as the xeed coat, or teMa (Fig. 



314). The development of this testa 



hermetically seals the structures within, 



further development and activity are 



checked, and the living cells pass into 



tlie resting condition. This protected structure with its 



dormant cells is the seed. 



The organization of the seed (diecks the growth of the 

 embryo, and this development within the seed is known as 







Fig. .315. Pine secfllinr;.', showing the Inni; hypnontyl .ind the rnmerons eotyledons, 

 with the old seed case still iittitched.— After Atkinson. 



