cauline axillary shoot cauline axillary branch (related) plant_anatomy PO:0005002 epiblasto (epiblastema) axilar caulinar (Spanish, exact) The genetic distinction between cauline axillary branches and tillers may or may not be unique to the Poaceae. There are no data for other plant families. 茎生腋枝 (Japanese, exact) An axillary branch that forms from a leaf above the very base of the shoot. axillary shoot system