Sect. XXXIX. 8. i. GENERATION. 41? 



but from any part of the long caudex gemmae above mentioned, 

 as appears from new buds fpringing out from any part of the 

 bark, when the top of a branch is cut off. 



Now if a fcion of a nonpareil apple be ingrafted on a crab 

 •ftock, and a golden-pippin be ingrafted on the nonpareil, what 

 happens ? — The caudex of the bud of the golden-pippin confifts 

 of its proper abforbent veffels, arteries, and veins, till it reaches 

 down to the nonpareil ftock ; and then the continuation of its 

 caudex downwards confifts of veffels fimilar to thofe of the non- 

 pareil ; and when its caudex defcends Mill lower, it confifts of 

 veffels fimilar to thofe of the crab-ftock, 



The truth of this is (hewn by two circumftances ; firft, be- 

 caufe the lower parts of this compound tree will occafionally put 

 forth buds fimilar to the original ftock. And fecondly, be- 

 caufe in fome ingrafted trees, where a quick-growing fcion 

 has been inferted into a ftock of flower growth, as is often feen 

 in old cherry-trees, the upper part of the trunk of the tree has 

 become of almoft double the diameter of the lower part. Both 

 which occurrences (hew, that the lower part of the trunk of the 

 tree continues to be of the fame kind, though it muft have been 

 fo repeatedly covered over with new circles of wood, bark, and 

 cuticle. 



Now as the caudex of each bud, which panes the whole 

 length of the trunk of the tree, and forms a communication from 

 the upper part or plumula, to the lower part or radicle, muft: 

 confift in thefe doubly ingrafted trees of three different kinds of 

 caudexes, refembling thofe of the different ftocks or fcions ; we 

 acquire a knowledge of what may be termed a lateral or pater- 

 nal mule, in contradiftinclion to a fexual mule. For as in thefe 

 trees thus combined by ingraftrr^nt every bud has the upper 

 part of its caudex that of a golden-pippin, the middle part of it 

 that of a nonpareil, and the lower part of it that of a crab ; if 

 thefe caudexes, which conftitute the filaments of the bark could 

 be Separated intire from the tree with their plumules and radi- 

 cles, they would exhibit fo many lateral or paternal mules, con- 

 fiding of the connected parts of their three parents ; the plu- 

 mula belonging to the upper parent, and the radicle to the low- 

 er one, and the triple caudex^to them all. 



A feparation of thefe buds from the parent plant is faid to 

 have been obferved by Mr. Blumenbach, in the conferva fonti- 

 nalis, a vegetable which confifts of fmall ftiort flender threads, 

 which grow in our fountains, and fix their roots in the mud. 

 He obferved by magnifying glaffes, that the extremities of the 

 threads fwell, and form fmall tubera or heads j which gradually 

 feparate from the parent threads, attach themfelves to the 



Vol. I. F f f ground? 



