) per bundle we found that >50% of flow was provided by the largest 10% of vessels in each tissue type (Tyree & Ewers, 1991; Petit et al., 2009). On this basis we compared the mean vessel diameter of petioles and peduncles based on the mean diameter of the largest 10% of vessels. Theoretical hydraulic conductivity (kh, m4 MPa−1 s-1) for sampled petioles and peduncles was also calculated from the Hagen‐Poiseuille equation: