Well, you can define the structure of a L-system pretty simply. There's probably a shared interest between ferns in having a simple set of instructions at a genetic level and mathematicians in working with mathematical structures that have descriptions simple enough for us to reason about.
Ask Science
Ask a science question, get a science answer.
Community Rules
Rule 1: Be respectful and inclusive.
Treat others with respect, and maintain a positive atmosphere.
Rule 2: No harassment, hate speech, bigotry, or trolling.
Avoid any form of harassment, hate speech, bigotry, or offensive behavior.
Rule 3: Engage in constructive discussions.
Contribute to meaningful and constructive discussions that enhance scientific understanding.
Rule 4: No AI-generated answers.
Strictly prohibit the use of AI-generated answers. Providing answers generated by AI systems is not allowed and may result in a ban.
Rule 5: Follow guidelines and moderators' instructions.
Adhere to community guidelines and comply with instructions given by moderators.
Rule 6: Use appropriate language and tone.
Communicate using suitable language and maintain a professional and respectful tone.
Rule 7: Report violations.
Report any violations of the community rules to the moderators for appropriate action.
Rule 8: Foster a continuous learning environment.
Encourage a continuous learning environment where members can share knowledge and engage in scientific discussions.
Rule 9: Source required for answers.
Provide credible sources for answers. Failure to include a source may result in the removal of the answer to ensure information reliability.
By adhering to these rules, we create a welcoming and informative environment where science-related questions receive accurate and credible answers. Thank you for your cooperation in making the Ask Science community a valuable resource for scientific knowledge.
We retain the discretion to modify the rules as we deem necessary.
Here's some good reading on L-systems, written by the guy they're named after:
The Barnsley Fern was constructed specifically to resemble the species of fern that it does. There are versions of it that have been modified to resemble other ferns. The fractal isn't some secret mathematical code for why ferns look like they do, it's more like a drawing of a fern. If someone made a fractal to look like another leaf, it would be just that, not an advancement into the secrets of botany.
The short answer: no. The two do not connect beyond the fact that ferns have a design reminiscent of a fractal, which is likely what inspired the fractal's creation.
How "real" is it? It is a real set of functions, but if I design a set of functions to look like William Dafoe, it doesn't mean I've cracked the matrix code into his genetics.