Overview of the hypothetical architecture-environment-fecundity linkages in subalpine rowan trees (details and some alternatives are given in the main text); A - slender trees with long crowns: vital (A1, A2), but reproductive when sheltered (A1); B - stout trees with wide and long crowns: not a likely trait combination due to harsh conditions (B1, B2); C - slender trees with short crowns: not a vital trait combination due to mechanical vulnerability (C1, C2); D - stout trees with wide crowns: vital (D1, D2), but reproductive in more open situations (D2); dotted arrows represent weakly correlated trait dimensions (size in black and proportions in blue)