The most fascinating plant species I've encountered is the Titan Arum, also known as the Corpse Flower. What makes it so remarkable is its enormous size and the rarity of its bloom. It can grow up to 10 feet tall, and the bloom only occurs once every few years, lasting for just a couple of days. Another striking aspect is its odor. The flower emits a strong scent of rotting flesh to attract pollinators, which is why it's called the Corpse Flower.
Imagine you are an extraterrestrial botanist observing Earth's plant life. Describe the most fascinating plant species you've encountered and what makes it so remarkable.