Lay Day: Cayo Costa State Park MM 25.0 I
Latt: 26 41 18 N
Long: 82 14 26 W
Weather: Variable wind 10 or less; 85, 65; mostly sunny
Comment: Today we participated in an Eco Tour of the park. The tour was led by a volunteer naturalist whose knowledge base is in the ecology of Ohio. She was not particularly comfortable with her expertise of the flora and fauna of this park, even though she has been doing the Eco Tours for six years!
There were four tour participants and we found her to be knowledgable in the basic flora of the island. We learned about a few plants we have seen, but didn’t know much about. Here’s a partial list:
1. Madagascar Periwinkle:
This periwinkle is native to Madagascar. It has escaped cultivation and naturalized in most of the tropical world where it often becomes a rampant weed. It is established in several areas in the southern U.S. Madagascar periwinkle is grown commercially for its medicinal uses in Australia, Africa, India and southern Europe.
Madagascar periwinkle is poisonous if ingested or smoked. It has caused poisoning in grazing animals. Even under a doctor's supervision for cancer treatment, products from Madagascar periwinkle produce undesirable side effects.
2. The Rosary Pea:
One of the most deadly plant toxins, abrin, is produced by rosary pea (Abrus precatorius). Studies have shown that as little as 0.00015% of toxin per body weight will cause fatality in humans (a single seed). Interestingly, birds appear to be unaffected by the deadly toxin as they have been shown to readily disperse rosary pea seed. The Rosary Pea is one of the top ten deadliest plants.
3. Brazilian Pepper:
The family Anacardiaceae contains poison ivy, poison oak, poison sumac, and Schinus terebinthifolius, or Brazilian pepper-tree. People sensitive to poison ivy, oak or sumac may also be allergic to Brazilian pepper tree.
Native to Argentina, Paraguay, and Brazil. Brazilian pepper tree was brought into Florida in mid-1800 for use as an ornamental plant. Its bright red berries and brilliant green foliage are used frequently as Christmas decorations. It threatens Florida’s mangroves. In fact, it is believed that the mangroves will succumb to the Brazilian Pepper in our lifetime.
4. he Spanish Stopper:
Smells like a skunk; said to be used medicinally to "stop" diarrhea.
6. Leather Leaf Fern:
12-24 inches long and 5-8 inches wide. Tufted, pinnate fronds are shiny and dark green. Stem is strong and flexible; brown at the base. Leaves are leathery and display distinct veins.
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| Rosary Pea |
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| Leather Leaf Fern |
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| A String of Shells |
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| Cheryl (tour guide) and Dave (islander) |
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| Brazilian Pepper |
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| Dinner (see the fish?) |
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| Sunset over Cayo Costa |