Black-Jack is an example of an angiosperm. It is common throughout Florida. Its defining feature is the appearance of its flowers. This one was observed in a flatswood forest near Tampa. The weather was clear, the temp. was in the 90s, and there was little wind.

This seeded vascular plant was found at the Lettuce Lake Park on Sept. 30th, 2019 around 2:45pm. The weather was sunny and the air was damp. This plant was found at the base of a tree in a grassy and damp area. The few flowers found were very small in size, about a couple millimeters wide. The pedals were white, and the center of the flowers were yellow. There were some not fully developed flowers next to the developed ones that are a green color. According to keys lucid central, these flowers can be between 20-150 cm tall. The ones observed here were short and around 20cm tall or less.

https://keys.lucidcentral.org/keys/v3/eafrinet/weeds/key/weeds/Media/Html/Bidens_pilosa_(Blackjack).htm

The organism was found in a very sunny area, close to the ground, and growing in large numbers. It was not super close to water and was surrounded by many other leafy organisms. It had a thin and short stem leading to a yellow, pollen-filled center surrounded with 3 to 4 short white petals. A detailed description can be found at: https://florida.plantatlas.usf.edu/Plant.aspx?id=3604