193 



and the same normal Fibonacci phyllotaxis; this phyllotaxis 

 appears undisturbed at the beglnning (the first 5 leaves) and at 

 the end (the bracts); in the middle part there are two kinds of 

 déviations. 



The first and for us the most important kind results from a 

 very pecuHar growth of the stem; the internodes above leave 5, 

 above leave 1 8 and above leave 30, are stretched considerably, those 

 between the leaves 6 — 18 and between 19 — 30 are hardly developed 

 at ail. As a resuit of this peculiar way of growing two eigglomerations 

 of leaves are formed, which are by no means true whorls, but 

 which are sufficiently like whorls as to hâve always been described 

 as such. 



The second kind of déviation is the metatopy in longitudinal 

 sensé. A certain leaf-scar may grow up to a level, higher than that 

 which would correspond to its order of séquence in the original 

 phyllotaxis. This metatopy is only slightly represented hère; if it 

 had been more developed, the présent investigation would hâve 

 been much impeded. Différences of the same kind, but much 

 smaller, are to be seen between the leaves of the two whorls; so 7 

 was placed a little below 6, 12 below 1 1 , 20 below 19, 23 below 22. 



The other shoots of the same species I examined, showed in every respect 

 quite analogous phenomena. A second stem, number 6 of p. 1 90 with a quite regular 

 left-hand spiral, will be sufficiently described by givmg the lengths of the successive 

 internodes. 



