TISSUES OF ANGIOSPERM& 



439 



Fipr. 314. Showing the disposition of the fibre-vascular bundles in the stem of Clem- 

 atis Vtticetta. a. b, c, d, e,f, the bundles from the lower pair of leaves; g, A, i, 

 k, I, m, the bundles from the second pair of leaves ; n, o, />, q, r, , the bundles 

 from the third pair of leaves ; <e and t, the median bundles of the fourth pair of 



loaves ; a, ,3. y, J, pairs of rudimentary leaves not yet supplied with bundles. 



After Nageli. 



