ADULT ANATOMY OF WELWITSCHIA MIRABILIS, 331 
omitted, be regarded as representing such a case. It is in fact almost duplicate of 
another plant in which A was not present. It will be seen that in such plants the apex 
is not buried and might well be able to undergo further development. 
Cases have been recorded in which the first pair of leaves remained small and later 
growth of the apex produced extra leaves *, 
Fig. 1. 
Among my material was only one case, a mature plant (text-fig. 1) t, in which a nee 
extra leaf had been produced by an individual otherwise quite normal. ri wn Z 
takes its origin deep down between two cotyledonary buds, and must have - pr M 
by growth at or near the depressed apex. It decussates with the cane 
first pair, but is considerably narrower, and its width is much less T e z o "a 
cotyledonary buds. The cotyledonary buds diverge considerably at ae e ih "e 
this leaf originates, but are contiguous on either side of the leaf. The line o - 
between them is even here, however, quite distinct, and it appears that, n 
probably to the unusual extra growth at the apex, they remained separate until a 
te stage. nee : 
In one of my young plants (Pl. 34. fig. 7), already referred to z se es eru 
donary buds remaining unfused, a curious elongated projection (A, ane ipsam 
the buds in the position occupied by the apex in the young plant. : M : j urs 
Was shown by anatomical examination to be in organic continuity = “te a " ie 
its origin between the lobes of the crown, from the apex of the stem ; 2 : SAFEN 
qualified to give any decided opinion as to its morphological nature. PIE, 
verse section, and at its base it is composed of parenchymatous SeN wi oan 
Supply ; higher up the central portion is still parenchymatous, while a nu gro 
I, p. 593). 
* C. Naudin, * The Gardeners’ Chronicle,’ Aug. 13, 1881 (ev Bower, ms has a lent it to me. 
T This photograph was taken near Mossamedes by Professor Pearson, 
