[Home] [Up]
| |
Fig.
15.2-8a and b. Transverse section of wood of Zamia (called
“cardboard palm” – but Zamia is a gymnosperm, not a monocot).
Cycads like this Zamia in the upper micrograph have manoxylic
wood – wood high a high abundance of parenchyma. The rows of
tracheids are narrow, and the parenchyma cells are filled with starch grains
(small arrows).
This
is very different from the pycnoxylic
wood of conifers, shown in the lower micrograph of pine, in which
parenchyma is rare and almost all the wood consists of axial tracheids.
|