H. novo-guineensis:
Two of the species had no provenance-differentiation in
Tleaf or Tcrit, but for differing
reasons. For H. novo-guineensis , strong
provenance-differentiation was observed in leaf width, leaf inclination
angle, and the thermal time constant, all of which were higher for the
upland provenance than the lowland provenance. However, the net effect
of variation in these traits - wider leaves would increase
Tleaf, but steeper leaf angles would reduce
Tleaf - led to a lack of provenance-differentiation in
Tmod that was supported by Tleaf. This
highlights the importance of considering the suite of leaf thermal
traits in combination.