Image Interpretation

 

What are the features labeled A-D? Try and identify the plant axes. What type of axes are those in the centre and right of the image, and why? The scale bar = 1mm.

A: Xylem strand
B: Phloem cells
C: Remnant pore space, filled by blue-stained epoxy resin
D: Shrunken and partially decayed axis
Plant: Trichopherophyton teuchansii
Axes: These axes are most likely to be rhizomal axes of Trichopherophyton because they lack the characteristic spinose projections seen in the aerial axes. The epidermis of the axis in the centre of the image is papillate and displays a number of short blunt-tipped emergences, possibly representing rhizoids.