WOODY TISSUE. 
85 
the conifer®, each pore having a smaller one in its 
centre. In some woods, and especially in fossil sped** 
FIG. 73 . 
FIG. 74 . 
f® 
0 
foil 
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P 
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© 
01 
b 
0 
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6 
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f a\l 
Woody fibres of 
Clematis. 
Woody fibres of Deal , exhibiting 
bordered pores. 
mens of Araucaria , three or more rows of pores occur 
in each fibre. 
Spiral fibres may also co-exist with pores, as in the 
Yew , (Fig. 75) each woody fibre of which has two 
spirals interlacing each other, and one or two pores 
F X G • / D * 
Section of Yew, showing 
bordered pores and spiral 
fibres. 
fig. 76 . 
Section of Araucaria ewcelsa 
exhibiting large bordered pores 
and spiral fibres. 
