On a trip to La Gomera (Canary Islands) in September 2006 I found these plants (all the same species, living and dried up) which show surprising similarity with the irregular recursive tree from Monster5.
Living natural plant from Gomera with 'recursive' properties
Same plant dried up from Gomera with 'recursive' properties
Same plant dried up from Gomera with 'recursive' properties
Tree 2 from Monster5 (Growth factor 0.55, size 110, only in 2D)