Fig. 1.

Schematic diagram of the inflorescence thermogenic zone used to study heat transfer. R_s ( = r), inflorescence radius (m); L, length of male zone inflorescence (m); T_∞, ambient air temperature (°C); Φ_V, dry heat flux leaving the male zone inflorescence (W); δ, thickness of the conductive boundary layer (m); λ, conductivity coefficient of the inflorescence (Wm⁻¹ K⁻¹); λ_a, conductivity coefficient of stagnant air (Wm⁻¹ K⁻¹).