North America Native Plant

Segestria Rubentior

Botanical name: Segestria rubentior

USDA symbol: SERU9

Habit: lichen

Native status: Native to North America  

Segestria rubentior: A Mysterious Lichen Worth Investigating If you’ve stumbled across the name Segestria rubentior in your quest to understand native lichens, you’ve encountered quite a puzzle! This supposed lichen species presents an interesting case study in the sometimes confusing world of botanical nomenclature. The Mystery of Segestria rubentior While ...

Segestria rubentior: A Mysterious Lichen Worth Investigating

If you’ve stumbled across the name Segestria rubentior in your quest to understand native lichens, you’ve encountered quite a puzzle! This supposed lichen species presents an interesting case study in the sometimes confusing world of botanical nomenclature.

The Mystery of Segestria rubentior

While listed as a lichen native to North America, Segestria rubentior is proving to be something of an enigma in the botanical world. The name Segestria is more commonly associated with funnel-web spiders rather than lichens, which raises questions about the accuracy of this classification. Extensive searches through major lichen databases and taxonomic resources haven’t yielded reliable information about this particular species.

What This Means for Your Garden

If you’re interested in supporting native lichens in your landscape, you’re on the right track! Lichens are fascinating organisms that are actually partnerships between fungi and algae (and sometimes cyanobacteria). They play important ecological roles and can add subtle beauty to gardens.

However, since we can’t verify the existence or characteristics of Segestria rubentior specifically, we can’t provide guidance on identifying or encouraging this particular species.

Understanding Lichens in Your Garden

Instead of focusing on this mysterious species, let’s talk about lichens in general and how they benefit your garden ecosystem:

  • They’re excellent air quality indicators – healthy lichen populations suggest clean air
  • They provide food and nesting materials for birds and small animals
  • They help break down rocks and contribute to soil formation
  • They add interesting textures and subtle colors to tree bark, rocks, and other surfaces

How to Support Native Lichens

Rather than trying to plant lichens (which isn’t really possible), you can create conditions that welcome them:

  • Minimize air pollution around your property
  • Avoid using harsh chemicals or pressure washing surfaces where lichens might grow
  • Maintain diverse plantings that support overall ecosystem health
  • Leave some natural surfaces like tree bark and rocks undisturbed

The Bottom Line

While Segestria rubentior remains a botanical mystery, your interest in native lichens is commendable! Focus on creating a healthy, chemical-free environment, and native lichens will likely find their way to your garden naturally. If you’re passionate about lichen identification, consider connecting with local mycological societies or naturalist groups who can help you identify the species actually growing in your area.

Sometimes the most interesting discoveries in gardening come from the questions we can’t immediately answer!

Segestria Rubentior

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Pyrenulales

Family

Trichotheliaceae Bittner & F. Schill.

Genus

Segestria Fr.

Species

Segestria rubentior (Stirt.) R.C. Harris

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA