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Term Definition
Percurrent tertiary venation Tertiaries from the opposite secondaries joining (Hickey, 1973) Percurrent tertiary venation of Allantoma decandra. Drawing by Y.-Y. Huang
Reticulate tertiary venation Tertiary venation anastomosing with other tertiary veins or with the secondary veins (Hickey, 1973) Abaxial leaf blade surface of Eschweilera spccostarica. Photo by S. A. Mori
Tertiary venation The third degree or third smallest veins in a leaf blade, arising from the secondary veins. Venation features of the black oak. Photo by S. A. Mori.