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The funny part is this: That broccoli is not 'natural'. Romanesco Broccoli, like all broccoli, is a selectively-bred cultivar of Brassica oleracea. Also of that same species: kale, cabbage, cauliflower, and Brussels sprouts.

I agree that most of these pictures are not of fractals.

I would add the lily pad, thinking cactus, cabbage and fern to the list of fractals. There are only a couple of octaves/iterations in each but there is some self similarity there.

Otherwise there are probably just a lot of Fibonacci spirals(although I haven't counted them).

For more on Fibonacci spirals see this[1] excellent video series by Vi Hart.

[1]https://www.youtube.com/watch?v=ahXIMUkSXX0

I'm not sure they count as nature either. Broccoli was cultivated from http://en.wikipedia.org/wiki/Brassica_oleracea I think