Relationships between seed mass and significant climatic variables in SEM.

<p>The climatic variables are annual mean temperature (a), precipitation seasonality (b), total potential evaporation in the fall (c) for black spruce (solid circle); annual precipitation (d) for white spruce (solid square); mean temperature of GS (growing season) (e) and total potential evaporation of GS (growing season) (f) for jack pine (solid triangle point-up).