At the base of each pinnate leaf petiole grow two thorns, about long.
2.
Each pinnate leaf has 7 13 leaflets, each of which is 2 4 inches long.
3.
The fossils are assigned to Banksieae based on several structural grounds, including brachyparacytic stomata, a trichome base architecture unique to Banksieae, " banksioid " venation, and the pinnate leaf lobes.
परिभाषा
a leaf resembling a feather; having the leaflets on each side of a common axis