128 Mr. A. Henfrey on the Proyress of Physioloyical Botany : 
placed so as to converge more toward each other, since they take 
away a portion of pith with them, and the centripetal arrange- 
ment is finally perfected. In a directly opposite manner occurs 
their reunion with the central mass by the loss of the concentric 
arrangement of their woody bundles, and their reception into a 
cavity which is produced at a corresponding point in the central 
mass. 
From the nature of the composition, therefore, the lateral bo- 
dies have a pith, like the central, also medullary rays and fibrous 
tubes, but the author has not observed annual rings in either. 
The existence of this pith in the lateral bodies has been denied*, 
but on insufficient grounds ; the round or oval central cellular 
mass into which the medullary rays enter, for example in Paul- 
linia pinnata, cannot be called anything but pith. A. de Jussieu 
also describes a pith in the lateral woody masses of several Sapin- 
dacece, especially Serjania cuspidata, which pith was inclosed in a 
medullary sheath containing spiral vessels, and was of a cylin- 
drical or flattened form. Gaudichaud figures the latter form of 
pith, which is centrally situated in the central woody mass, but 
more or less excentrical, toward the external surface, in the 
lateral bodies. 
It is important to observe that the central and lateral bodies 
are all inclosed in a common bark which contains a common 
layer of liber ; since this proves that the lateral woody masses are 
not liber-bundles of the bark, as Martins t appears to have as- 
sumed. But the author observes that, so far as his limited ma- 
terials allowed him to see, the circle of liber above-mentioned 
does not increase in diameter proportionately with the woody 
masses. 
An attempt has also been made by Martius to explain the 
presence of these anomalous lateral masses by considering them 
as undeveloped branches running under the bark in the manner 
that the roots do in some Lycopodia, as was pointed out by 
Ad. Brongniart J, who thereby explained some phsenomena ob- 
served by him in the fossil genus Siyillai'ia. Bindley § has 
observed a similar condition in a Barbacenia from Bio Janeiro. 
Before these phsenomena can be applied to an elucidation of the 
structure of the Bapindacece., it is necessary to investigate these 
lateral woody bodies in their earliest conditions. With this view 
the author examined Paullinia pinnata, taking a yet herbaceous 
twig about eighteen inches long on which three leaf-scars ex- 
isted on the three angles, while two leaves were still in a vege- 
* Schleiden, Grundz. 2nd ed. ii. 162. 
t Geber die Veg. d. unacht. u. acht. Parasit. Miincb. gel. Auz. 1S42, 
N. 44-49. 390. 
I Archiv du Mus. i. 
§ Introd, to Bot. 3rd ed. 316, figs. 191-3. 
