North America Native Plant

Bonebract

Botanical name: Sclerocarpus

USDA symbol: SCLER3

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states âš˜ Non-native, reproduces and persists in the wild in Puerto Rico âš˜ Non-native, reproduces and persists in the wild in the U.S. Virgin Islands  

Bonebract: A Lesser-Known Native Annual Worth Investigating If you’ve stumbled across the name bonebract in your native plant research, you’ve discovered one of those intriguing botanical mysteries that make gardening so fascinating. Scientifically known as Sclerocarpus, this annual forb represents a lesser-known piece of America’s native plant puzzle that deserves ...

Bonebract: A Lesser-Known Native Annual Worth Investigating

If you’ve stumbled across the name bonebract in your native plant research, you’ve discovered one of those intriguing botanical mysteries that make gardening so fascinating. Scientifically known as Sclerocarpus, this annual forb represents a lesser-known piece of America’s native plant puzzle that deserves a closer look.

What Exactly is Bonebract?

Bonebract is an annual herbaceous plant—what botanists call a forb. Think of it as a non-woody flowering plant that completes its entire life cycle in one growing season. Unlike perennials that return year after year or shrubs with woody stems, bonebract starts from seed, flowers, sets seed, and dies all within a single year.

Where Does Bonebract Call Home?

Here’s where things get interesting from a native gardening perspective. Bonebract is native to the lower 48 United States, with confirmed populations in Texas. However, it’s also found as a non-native species in Puerto Rico and the U.S. Virgin Islands, where it has naturalized and reproduces on its own.

This distribution pattern suggests bonebract is quite adaptable, though its primary native range appears to be in the southwestern regions of the United States.

Should You Grow Bonebract in Your Garden?

Here’s the honest truth: bonebract falls into that category of plants that fly under the horticultural radar. While it’s definitely a native species worth respecting, there’s limited information available about its garden performance, aesthetic qualities, or specific growing requirements.

The Challenge with Lesser-Known Natives

Plants like bonebract present both opportunities and challenges for native gardeners:

  • They may fill unique ecological niches in their native habitats
  • Limited cultivation information makes them harder to grow successfully
  • Seeds or plants can be difficult to source commercially
  • Their garden value hasn’t been well-documented

Growing Considerations

Since bonebract is an annual forb, you’d theoretically need to replant it each year or allow it to self-seed. However, without specific information about its preferred growing conditions, USDA hardiness zones, or care requirements, attempting to cultivate this plant would be largely experimental.

A Responsible Approach

If you’re intrigued by bonebract and live within its native range, particularly in Texas, you might:

  • Contact local native plant societies for more information
  • Check if any botanical gardens or research institutions are studying this genus
  • Consider better-documented native alternatives that provide similar ecological functions
  • Look for it in its natural habitat to observe its growing conditions and appearance

The Bottom Line

While bonebract represents an authentic piece of American native flora, it’s one of those plants that might be better appreciated in its natural setting rather than in cultivation—at least until we know more about its garden potential. Sometimes the most responsible approach to native gardening is acknowledging when we don’t have enough information to make informed recommendations.

For now, if you’re passionate about supporting Texas native plants, consider focusing on well-documented species like bluebonnets, Indian paintbrush, or native sunflowers that offer proven garden performance and clear ecological benefits. The plant kingdom is vast and wonderful, and sometimes the most mysterious species are best left to continue their quiet existence in the wild.

Bonebract

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Sclerocarpus Jacq. - bonebract

Species

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