What is the invasive plant seen in Yosemite?

The invasive plant seen in Yosemite is called mullein, a tall flowering plant native to Europe, Asia, and Africa.

Why is mullein considered a threat in Yosemite?

Mullein is a threat because it grows rapidly, outcompetes native plants for resources, harms ecosystems, and can host other invasive pests.

How can invasive plants like mullein be managed in national parks?

Management involves educating the public about native species, preventing the introduction of invasives, and promoting the planting of native flora.

Home / Environment / Yosemite's Invasive 'Monstrosity' Sparks Outrage

Yosemite's Invasive 'Monstrosity' Sparks Outrage

16 Dec, 2025

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Summary

An invasive plant called mullein, native to other continents, is growing in Yosemite.
Mullein can harm native ecosystems by outcompeting local plant species for resources.
This invasive species negatively impacts wildlife and can affect local economies.

Yosemite's Invasive 'Monstrosity' Sparks Outrage

Tall, stalk-like plants identified as mullein have been spotted and shared by a visitor in Yosemite National Park, drawing strong reactions. This invasive species, originating from Europe, Asia, and Africa, poses a significant threat to North American ecosystems. Its rapid growth allows it to aggressively outcompete native plants for essential resources like water and sunlight.

The proliferation of invasive species like mullein can lead to a decline in native plant populations, disrupting the delicate balance of local ecosystems. This ecological imbalance can subsequently impact insects and animals that depend on native flora for survival. Furthermore, invasive plants can introduce secondary pests and negatively affect biodiversity.

Beyond ecological damage, invasive plants can have economic repercussions, impacting agriculture and public utilities. Experts suggest that educating oneself about local native plants and opting for natural lawns can help mitigate the spread of invasives. Rewilding yards with native species supports ecosystems and attracts beneficial wildlife, promoting a healthier environment.

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