Table 2.

A list of measured traits and their units

Variable	Unit
Epidermal cell density	mm–2
Epidermal cell size	mm2
Leaf hydraulic conductance	mmol m–2 s–1 MPa–1
Leaf mass per unit area	mg mm–2
Leaf size	cm2
Lignin per unit area	mg mm–2
Lignin per unit dry weight	mg g–1
Midday leaf water potential	MPa
Minor vein diameter	mm
Minor vein volume per unit area	mm3 mm–2
Stomatal density	mm–2
Stomatal index	Unitless
Stomatal size	mm2
Vein density	mm mm–2