624 PIBRO-VASCULAK SYSTEM OF THE APPLE, 



EXPLANATION OF PLATES XXL -XXV. 



Plate xxi. 



Fig. L — Transverse, median section of an apple, showing the ten primary 



fibro- vascular bundles in the form of ten greenish dots, arranged 



in a circle, each bundle being either opposite to, or intermediate 



with each of the five carpels. 

 Fig. 2. — Thin, transverse slice of Rome Beauty, showing twelve fibro- 



vascular bundles, corresponding to the six carpels. The bundles 



are seen branching outwardly, and becoming much subdivided just 



beneatli the skin. 

 Fig. 3. — Transverse, median section of Rome Beauty, showing eight fibro- 



vascular bundles, when there are only four carpels. 

 Fig.4. — Diagi-ammatic, transverse section showing how the branches of 



each bundle ultimately divide in a forked manner, and break up 



into minute branchlets, intertwining witli each other just beneath 



the skin. 



Plate xxii. 



Fig.5. — Longitudinal, median section of an apple, ahowiug the wall of the 

 " core" attached below to the top of the stalk, and above passing 

 into the " eye." 



Fig.6. — Thin, longitudinal slice of an apple, showing vascular bundles 

 running lengthwise from the stalk, along the outer wall of the 

 " cor-e," and the forked branches beneath the skin. 



Fig.7. — Diagrammatic, longitudinal section, showing one of the primary 

 vascular bundles diverging from the top of the stalk, and giving 

 rise to secondary branches supplying the " core," on tiie one hand, 

 and the " flesh," on the other. The branches to the core envelop 

 the carpels in a fine network, so that every part is reached l)y the 

 conducting tissue. The various branches supplying the flesh from 

 each of the primary bundles also form a united network extending 

 from the "eye" to the stalk, and completely surrounding the 

 bulk of the flesh. On the outside, the strands of this network 

 give off plume-like branches reaching to the skin, and breaking up 

 into innumerable, fine filanrents which intertwine. 



Fig.8. — Fibro-vascular system as a whole, showing the main trunks and 

 the rrumerous branches. 'Lhe network of vessels is seen covering 

 the carpels in the interior arrd the outer branches end in a perfect 

 maze of branchlets beneath the skirr. 



Plate xxiii. 



Fig.9. — Longitudinal, mediarr section, with the flesh surrourrding the core 



removed. The top of the stalk is shown still attached to the core, 



which extends to the "eye" at the apex. From the top of the 



stalk, a prinrary vascular bundle, on each side, surrounds the core 



