Figure 4 . Relationship between inferred boundary layer
conductance to heat (g bh) and time constant for
leaf cooling (τ ) for leaf patches. Colors indicate species;
small, solid symbols denote hairy patches, and large, semitransparent
symbols denote bald patches. Variation in the relationship of estimatedg bh to the measured τ within each species
arises from differences in leaf heat capacity and stomatal conductance
among leaves.