bs 
A WORT EIU es 
NOT PIU VE 
RHIZOPHORA, 663 
at about $ from the apex. Towards the point the radicle be- 
comes indurated and at the very apex, there is a brown cal- 
lous spot. The induration increases. in extent as the root 
increases in length. The anatomy is simple, from the col- 
let to the commencement of the induration, it is entirely 
cellular. It consists of a rather thick outer tunic or bark, 
and of a central cellular part. The cells of the central part 
are rather larger, but otherwise do not differ from those of 
the bark, they are lax and of a rounded form, and contain 
many amylaceous globules. In the roots which have reached 
an inconsiderable length, the cells are chiefly of a brown 
color, but this color disappears in a great measure after- 
wards. Among the brown cells, larger and more prominent 
Ones are visible. The central part is thickest towards the 
collet. The bark is thickest at the thickest part of the root. 
_ The woody fibre is very dense and coheres very strongly to- 
_ gether. It has no connexion with the collet, and reaches in 
à radicle of 5 or 6 inches in length to an inconsiderable dis- 
_ tance, say 1 or 1} inches. The fibres do not occupy the 
. Whole of the substance except at the very apex. At a dis- 
. fance of 14 line from this part, the original cellular centre 
.— ls still visible. 
Queries, are there stomata? 2. Is the fibrous tissue origi- 
nally connected with the collet, or is it formed in an ascend- 
ing direction? 3. At what period is the whole of the radicle 
(s pied by this tissue ? 
Has. Mergue. 
l. R. decandra, Roxb. 
= Cuar, Frutex, — ccce obtasisaimis. 
calycibus 5-6 6 partit. staminibas 10-12, 
` Pet. concavis apicibus aristato erectis conniventib. laci- 
niatis, flam. longiusculis. Anth. bilocular longit. intror- 
