The editors' "produces one or two shapes not found in nature" may mean Fig.5a and Fig.6c, which are lacking the '[as] seen in' notes given for all others presen

The editors' "produces one or two shapes not found in nature" may mean Fig.5a and Fig.6c, which are lacking the '[as] seen in' notes given for all others presented. I'd say the author was going for showing that the model covered many (all ? ferns, etc.?) natural shapes. But both the issues of exists-in-nature-but-not-in-model and vice-versa should be interesting. Perhaps the sets of "these parameters do not show up in nature" can give the bio-mechanisms researchers some hints.