climbing in the genus Calamus . 1 2 7 
median plane of the leaf, on the sheath of which it is 
inserted : the angle of divergence of the successive leaves is 
approximately two-fifths. Tracing the sheath downwards from 
the point of insertion of the flagellum to the next lower leaf, 
a projecting rib will be found to pass vertically downwards to 
its axil, and thus the median plane of the flagellum coincides 
with the median plane of the next lower leaf. From these 
facts it may be presumed that the flagellum is an axillary bud, 
and that in the course of development of the shoot it has 
become displaced, and has become adherent to the sheath of 
Fig, 2. Transverse section through a bud of Calamus sp . 
showing seven leaves — / viii ) : the midrib of each is marked 
thus x : opposite each midrib, excepting those of l v and / viii , 
is seen an axillary bud ( — £ vii ) : the outermost bud (£*) is the 
axillary bud of the next outer leaf, which has been removed, 
(x 20.) 
the next higher leaf 1 . There are abundant grounds, in addition 
to those above stated, for considering this to be the true inter- 
pretation of the case ; they are as follows : — - 
(a) An examination of the adherent flagellum shows that it 
bears greatly reduced sheathing leaves, which, though they 
1 This assumption has been made by Drude ; see Schenk’s Handbuch, vol. i. 
p. 665. Treub, in describing them, calls them ‘ spadices metamorphoses.’ See 
Ann. du Jard. bot. de Buitenzorg, vol. iii. p. 172. 
