378 MR. T. W. WOODIIEAD ON THE 
Figs, 29-32. 
m 
, 
1 
Fig. 29. T. S. rhizome of Pteris aquilina growing under the shade 
of Beech. 
30, T. S. portion of 29150 diam. showing weakly-developed 
stereom. 
3l. T. S. rhizome of P, aquilina from a plant growing in an 
exposed situation in dry sandy soil. 
32, T. 8. of 31 showing strongly-developed stereom. x 150 diam. 
