Up
Pine xs, low mag
Pine, xs, hi mag
Pine, rs
Pine, ray in rs
Conifer needles
Linden xs
Ash, xs
Sieve plates
Collapase, tangential
Collapse, radial
Grape, xs
Proliferative tissue
Expansion tissue

Fig. 16.1-2. High magnification of transverse section of secondary phloem in pine. Even at this high magnification, there is not too much to see in a transverse section of pine phloem. Most anatomy labs will have teaching slides of this material, so you will probably have the opportunity to examine it yourself. Do not be surprised if you do not see much. Instead, look at the radial sections that are present on most slides of this type. Micrographs of those are shown in the next few figures.