With this descriptor, you can choose the taxonomic unit that you want keep for the identification.
identification within "subfamily" or "tribe" | |_ general stem pattern (ex-von Mohl's classification) | |_ wide metaxylem element | |_ phytoliths | |_ phytoliths distribution in central cylinder | |_ fibrous part centrifugal differentiation | |_ ground parenchyma sustained growth | |_ ground parenchyma of the central cylinder | |_ cortex | |_ superficial protective layer (sub-epidermal) | |_ tangential elongation and anticlinal divisions of subcortical parenchyma cells | |_ radial elongation of the fibrous part (in subcortical zone) | |_ fibrous bundles in central cylinder | |_ fibrous part adjacent to the xylem | |_ number of phloem strand | |_ little fibrous vascular bundles (bridges) | |_ radiating parenchyma | |_ tabular parenchyma | |_ metaphloem sieve plate | |_ paravascular parenchyma