The term "annual tree" is a bit of a misnomer because trees, by definition, are perennial plants, meaning they live for more than two years. However, there are certain tree species that have a lifespan of a year or less, and while not technically trees, they are sometimes referred to as "annual trees."

Here's what's likely happening:

* Confusion with annual plants: You might be thinking of annual plants, like sunflowers or marigolds, which complete their entire life cycle - from seed to flower to seed - in a single growing season.

* Short-lived trees: Some tree species, like bamboo, have a very fast growth rate and can reach maturity in just a few years. However, they are still perennial plants that can live for many years, just not as long as traditional trees like oak or maple.

* Tree-like plants: Certain plants, like corn, hemp, and cotton, are often referred to as "annual trees" because they have a tall, woody stem, but they are actually herbaceous plants. They are annuals and die after a single growing season.

Here are some examples of plants that might be mistaken for "annual trees":

* Bamboo: While a grass, bamboo can grow to great heights and have a woody stem. Most bamboo species are technically perennial, though some species have a shorter lifespan and can be considered annuals.

* Corn: A tall, upright grass with a woody stem. It is an annual plant and dies back after producing seed.

* Hemp: A fast-growing annual plant that has a fibrous stem. It is used for fiber and oil production.

* Cotton: A bushy annual plant with a woody stem and fluffy white bolls. It is grown for its fibers.

It's important to note that these plants are not actually trees, but they are sometimes referred to as "annual trees" due to their tall, woody growth habit.

If you're looking for information about true trees, you'll want to look at the lifespan and characteristics of specific tree species.