Xiaofeng Liu, PhD

California


Writing

Photo Stories

Nature’s color artist and air quality expert: Lichen

By Xiaofeng Liu published on February 29, 2012

Fossil Falls & Whitney Portal in California: Living Artworks Etched in Stone

This article isn't about human-made masterpieces—it’s about something far more profound. In this story, the artwork is alive, and the artist is nature itself. These are not traditional creations, but living artworks: lichens.

Often overlooked, lichens (or "Lyken" as I affectionately call them here) are symbiotic unions of fungi and algae. They live quietly at the edges of human attention, yet their resilience, subtle beauty, and ecological significance are extraordinary. Though small and unassuming, they quietly paint forgotten corners of the Earth with texture and color, breathing life into stone and purifying the air we depend on.

In botany, lichens barely earn a footnote, eclipsed by trees, flowers, and lush grasses. Literature rarely sings their praises—one of the few being Ye Shaoweng, who wrote: “I should pity the moss imprinted by the teeth of my clogs.” His reluctance to step on the lichen-covered courtyard is perhaps one of the earliest recorded tributes to their silent presence.

Lichens have often been used metaphorically to describe introspective minds—those who retreat into quiet corners, blooming in shadow. And that is the truth of their nature: they avoid the sun, thrive in shade, and reveal their delicate beauty only to those who take the time to look closely.

I hope this post brings them closer to you, deepening your appreciation for these quiet inhabitants of stone and time.

This encounter with lichens came unexpectedly during our Death Valley trip, particularly at Fossil Falls and the base of Mount Whitney. (For more on this journey, see: "[California] Death Canyon Survival Guide Part 1 – Strategy and Preview" and "[California Fossil Falls] A Wonderful Date Between Volcanic Magma and Glacial Meltwater.")

Some lichens can even survive in the harshest climates on Earth—scorching deserts, icy polar regions, barren alpine slopes, and even in toxic waste. Because they lack roots, they absorb all their nutrients directly from the air. This makes them highly sensitive to air quality, which is why their presence—or absence—is a biological indicator of environmental health. Where they flourish, the air is pure.

In Fossil Falls, blue-gray volcanic basalt serves as canvas. On its shaded sides, lichens weave vivid tapestries in white, orange, yellow, and green.

White dominates, but it’s the mix that turns stone into story. Without them, these heavy rocks would be dull and lifeless. With them, they glow.

A few examples:
– White lichen leaves bloom like tiny flowers across the basalt.
– Yellow and orange gather in warm harmony, as if painted by a natural brush.
– Even green lichen emerges here and there, standing out against the whites.
– A rare black lichen curls into the shape of a lowercase alpha, like a final signature on nature’s script.

Lichens not only dazzle the eye but serve as ecological powerhouses. Despite their size, they fix soil, retain moisture, reduce carbon dioxide into glucose, absorb minerals from rain and dust, and even fix atmospheric nitrogen. They’re humble yet essential.

Some look like rust, others like blooming flowers. There’s a gentle cartoonish quality to some, forming shapes that resemble characters like Mickey Mouse. Others exude intensity—an orange patch shaped like a scorpion, for instance.

In cooler, damper conditions near Mount Whitney, lichen colonies show different personalities—richer, more vibrant, even more textured. There are wild splashes of color and formations that evoke brushstrokes of calligraphy or furry thatched cottages. One patch, I swear, looks like a storybook roof under a cozy orange glow.

And among the most moving sights: newborn lichens growing atop the weathered layers of their ancestors—life continuing, unbroken, resilient. Generation after generation, they endure.

Lichens are not just organisms. They are whispers of time, quiet revolutions in color and form, artists of survival. Once you notice them, you'll never see stone the same way again.

In the quiet corners of Fossil Falls and Mount Whitney, lichens bloom like living brushstrokes—tiny symbiotic artists painting stone with resilience, color, and life in Earth’s most forgotten places.

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