* 
ee The Vegetable Individual, in tts relation to Species. 305 
_ atively independent members) this much at least is certain (and it is 
the important point here), that each of these two parts is capable 
of producing new growths by itself, yes, this capacity is enjoyed | 
even by different determinate or casual parts of either member. 
It is well known that the leaf of Bryophyllum produces sprouts 
in every notch on its edges, while on the other hand, caducous 
leaves of many bulbous plants (e.g. Eucomis regia, according 
to Hedwig, Ornithogalum thyrsoides according to Turpin )* pro- 
duce new plants in the form of bulblets on any portion of the 
whole of the upper surface. The petiole itself under certain cir- 
cumstances, has the power of producing the so-called adventi- 
tious buds, not only on the portions determined by the position 
of the leaf (leaf-axil), but sometimes on any other portions; a 
~ power enjoyed by the root in many cases. Hence parts of plants, 
Otherwise most dissimilar, when they contain cambium, ma 
have the power of reproducing the plant.t This is the founda- 
tion of the Schultz-Schultzenstein-ian doctrine of anaphytons ; 
viz., those vegetable members “which, even when separated from 
the plant, continue to live, bud, and develop,”{ and which are 
hence regarded as the individuals proper, as the true element- 
ary forms or morphological elements ; and it is by various com- 
binations of these that the organs (commonly so-called), raot, 
stalk and leaf, are formed, by the repetition of which the whole 
plant is built up and indefinitely renewed. : 
But where are the limits of the anaphytons? How shall lines 
be drawn to include all the buds of the root, stalk and leaf, from 
which new formations may spring? Aub. du Petit Thouars} 
who had already developed doctrines similar to those of the ana- 
phyton-theory, attempts to draw the line between individuals by 
i means of the cellular tissue, regarding every vascular bundle as 
' an individual, since it has in itself, and independently of all oth- 
ers, the means of its growth, its preservation, and the reproduc- 
tion of new bundles. But it is difficult to perceive how, in such 
a View, the labyrinth of anastomosing bundles, (not less compli- 
ted in the majority of petioles, than in most reticulated leaves, ) 
———— llc tll 
eee i 
#3 z siologie, where several examples are adduced. 
fo ater feat enphysiologie, whe nh wt ci vedio "will nod 
every one of their parts. (ravtaxt yap Exe xar pifay xal xatkovt duvéus. Vit. 
6, p 
: die Anaphytose (1848) and, System der Morphologie (1847). The 
noted is face Foul a tee work, Verjiingung im Pflanzenreich (1851). 
vark made above, when treating of the members of the petiole, holds good 
e phyta can by no means grow into new plants themselves ; 
is produced as a germ, which is not identical with 
e un individu ..... 
mémoires, il fant aller plus loin, car je crois que 
, puisqu’elle a en soi, indépendamment des 
men de conservation et de réproduction.” 
, No. 57.— May 1855. 39 
igs 
