Why Do We Keep Planting Trees That Smell Like Semen?

TL;DR

Some trees in cities emit strong and unpleasant odors to attract pollinators and spread their seeds, despite being disliked by humans.

Transcript

It’s a gorgeous day outside. The sun is shining, the city streets are lined with leafy, flowering trees. it’s a perfect day for a morning jog, you take a step out your front door, take a deep breath of that fresh morning air. Which is when you start gagging because you just inhaled a lungful of air that smells very strongly of vomit. And it’s not l... Read More

Key Insights

• 🤬 Some trees emit foul odors to attract specific animal species for pollination and seed dispersal, which is beneficial for their survival.
• 🤬 Ginkgo trees, known for their foul smell in fall, are popularly planted in cities due to their resilience and ability to adapt to urban environments.
• 😵 The Callery pear tree produces flowers with fishy or semen-like odors to attract pollinators for cross-pollination, but they can become invasive in urban settings.
• 😺 The Tree of Heaven is another smelly tree that emits a scent similar to spoiled peanut butter or cat urine and can outcompete native plant species.
• 🌲 City planners have limited tree options for urban environments, often choosing trees that are resilient but also emit unpleasant odors.
• 🌱 Efforts are being made to promote native plant life and control the presence and spread of smelly trees in cities.
• 👃 The presence of pollution in cities may also affect the smell emitted by trees.

Questions & Answers

Q: Why do some trees in cities emit foul odors?

Some trees release unpleasant smells to attract specific animal species for pollination and seed dispersal, ensuring the survival and proliferation of the tree species.

Q: How do Ginkgo trees reproduce?

Ginkgo trees are dioecious, with separate male and female trees. Male trees produce pollinating cones, while female trees produce seeds. The foul smell emitted by Ginkgo trees comes from the rotting fruit-like layer of the seeds, attracting animals to consume and spread them.

Q: Why do cities continue to plant smelly trees like the Ginkgo?

Despite the smell, cities choose to plant smelly trees like the Ginkgo due to their resilience and ability to survive urban environments. Their reproductive strategies also contribute to their widespread planting.

Q: How does the Callery pear tree impact urban environments?

The Callery pear tree produces flowers with unpleasant odors to attract pollinators. However, when planted too close together, these trees can quickly spread and become invasive, replacing native plant life.

Summary & Key Takeaways

• Certain trees in cities emit foul odors that resemble vomit or rotten food, which can be attributed to the trees' reproductive strategy.

• Ginkgo biloba, also known as the Maidenhair tree, is a popular but stinky tree planted in many cities due to its resilience and ability to adapt.

• Another smelly tree is the Pyrus calleryana, or Callery pear tree, which produces flowers that smell like rotting fish or semen to attract pollinators.