The Botany of Miami's Pine Rocklands & Hardwood Hammocks



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What did Miami look like before it was all paved?

In this video we take a look at one of the most endangered ecosystems in North America – the Pine Rocklands of Southern Florida.

Notable for their very thin (almost non-existent) topsoils, fire dependency & affinities with both Northern & tropical plant species, the Pine Rocklands and Hardwood Hammocks of South Florida are the convergence zone of species from more temperate zones to the North and more tropical, Carribean zones to the South.

In this plant community, dominated by Pinus densa (Miami slash pine), we also have the United States’ only Cycad, Zamia integrifolia (host for the endangered Atala Butterfly) as well as 3 palm species (#Coccothrinax argentata being a favorite, though Serenoa repens is a lovely one, too, prick). Poisonwood trees – Metopium toxiferum – are an itchy relative of poison ivy that takes in the form of a beautiful tree. Psychotria nervosa is a relative of coffee that grows in the hardwood hammocks, along with a number of interesting fern species, such as Anemia adiantifolia.

A very many thanks to Lydia Cuni for help in the production of this video. Lydia Cuni is a botanist and an expert in South Florida’s plant communities. Without her help and friendship this video would not have been possible. Or at least it certainly would have been more half-assed.

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33 thoughts on “The Botany of Miami's Pine Rocklands & Hardwood Hammocks”

  1. The zamias are very fascinating just in how palm like they are, the leaves, lack of internodal space, energy storing meaty stems and tubers, even the fruits which look like dates are eerily similar. The fruits are toxic to an absurd degree in order to deter the weevils that pollinate them from eating the seeds as they eat the cones, it can't be cooked out. It's truly tragic because they look so damn tasty coming off the plant. They're also the broadest leaved conifer found in north america (some in shadier areas adapted with thicc leaflets and they're common in cultivation).
    The seeds sprout easy if you know how to take care of most cactus, bury them 75% after cleaning the seeds (use gloves and mask, wash everything, don't risk a trip to the hospital) and then maybe soak in water 24 hours. They'll try to sprout during the summer and spring.

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  2. Another great video! I'm one of the lucky ones, I'm immune to urushiol. I've done tons of bushwacking and crawling through brambles and have never had a problem. Once, on a long distance horseback trip in the Northern California Coast Ranges, I setup a lean to in a rain storm using a big bramble of poison oak to support it. Crawled inside and slept all night. Nice 'n comfy.

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  3. if you're still in FL. please go up to honeymoon island SP. 🙏it's in dunedin so you could have a nice destroyed habitat/tourist hell/ron desantis rant and then hit the SP to cool ahff.

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  4. I can't wait until I own my own land so I can replace the lawn with natives. I did what I could at my current residence, replaced the dying barberry with native seeds, hopefully some sprout and my "flower bed" will be better than my neighbors.

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  5. Vittaria lineata is one of my all time favorite plants. I've tried a couple of times to cultivate it but so far haven't had any success.

    I've only ever seen it growing on palms. Other ferns tend to thrive more on palms than anywhere else. I wonder if there's something chemically about them that makes it a good place for ferns, or if the spores just happen to land there and grow. Maybe the fibrous stuff that palms tend to have just provides an ideal substrate for them.

    I've even noticed that non-native palms tend to collect sometimes 3 or 4 species of fern on them.

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  6. Went to Fla in '79 w/ my gf,walked a cleared construction site,found the burn pile and "rescued" some Encyclia tampensis and Phlebotium from certain death,still have them today…

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  7. What Miami-Dade has done to the native scrub and pinelands is disgusting. The county is MORE THAN HAPPY to sell the habitat off — including state- and federally-protected parts of the habitat. The pine rockland habitat you visited is the last one in the entire country, and MDC has been slowly selling it all off in the last 6 years. Just as bad is the protected land that FAU owns as part of its University acreage. The land includes a state-protected wildland habitat that is one of the last habitats of burrowing owls — the University's own mascot — in the United States and they continue selling off protected land for student housing.

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  8. You need to come up to the Kawartha Lakes in Ontario, man.. Major ecotone; transitionary area between St. Lawrence Lowlands and the Canadian Shield. Crazy diversity of stuff. Some remnant patches of native tallgrass prairie up here too.

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  9. Love your Philosophy on planting local. Sadly I had to sell my home that grew native vegetation in Volusia county Florida, but enjoy belonging to The Nature Conservancy knowing that even though I'm not planting they're saving natural areas for all of us.

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  10. I love the Florida videos! I live down here in S FL and I have 3' on either side of a paved courtyard that I've stuffed full of native plants (combo of caterpillar host plants, flowers for pollinators, and small trees and shrubs for birds).
    Took about 3 years for the atalas to find my Zamia so I kind of lost my shit the first time I saw one.

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  11. Thanks 'ad guy', (sorry I don't know you're name); seems everyone should look into a VPN these days;) Thanks to the lovely Lydia and Louie(?) for helping out with the Florida videos as well. I hope Louie's airport incident tummy is feeling better!

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  12. Im a biomedical engineering student at the University of Miami, and I helped with their connect to protect project where we are starting to take out invasive species, including animals, and replace them with native species of Pine Rocklands. It is currently going pretty well, we have re-established almost all native butterflies and insects within the University.

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  13. You and your buddy have mastered the art of commercials.. legitimately, and I’m not lying whatsoever, your ads are the ONLY adds I actually watch on YouTube. Awesome job dudes

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