North America Non-native Plant

Silybum Eburneum

Botanical name: Silybum eburneum

USDA symbol: SIEB2

Native status: Not native but doesn't reproduce and persist in the wild

Silybum eburneum: A Plant That Doesn’t Exist (And What That Teaches Us About Plant Names) If you’ve stumbled across the name Silybum eburneum in your gardening research, you might be scratching your head trying to find more information about this mysterious plant. Well, here’s the thing – you’re not going ...

Silybum eburneum: A Plant That Doesn’t Exist (And What That Teaches Us About Plant Names)

If you’ve stumbled across the name Silybum eburneum in your gardening research, you might be scratching your head trying to find more information about this mysterious plant. Well, here’s the thing – you’re not going crazy, and your internet isn’t broken. This particular plant name appears to be invalid or non-existent in the botanical world.

The Mystery of Missing Plants

Sometimes in gardening, we encounter plant names that sound official but don’t actually exist. Silybum eburneum falls into this category. While the genus Silybum is very real – you might know it from the famous milk thistle (Silybum marianum) – there’s no recognized species called eburneum within this genus.

The word eburneum means ivory-colored in Latin, which would suggest a plant with creamy white or pale yellow features. It’s the kind of name that could easily exist in the thistle family, but botanical databases and scientific literature don’t recognize this specific combination.

What This Means for Gardeners

If you’re looking to add a Silybum species to your garden, you’ll want to focus on the plants that actually exist. The most well-known member of this genus is:

  • Silybum marianum (Milk Thistle) – A striking annual with purple flowers and distinctive white-veined leaves

However, it’s worth noting that milk thistle can be aggressive and is considered invasive in some regions, so always check your local regulations before planting.

The Importance of Proper Plant Names

This situation highlights why botanical names matter so much in gardening. Common names can vary wildly from place to place, and sometimes incorrect names circulate in gardening circles. When in doubt, always verify plant names through reliable sources like:

  • Local extension services
  • Botanical gardens
  • Reputable online plant databases
  • University horticulture departments

What to Do Next

If you were specifically looking for Silybum eburneum, try to trace back where you first encountered this name. It might be:

  • A misidentification of another plant
  • A typo or error in a plant list
  • A synonym or old name that’s no longer used
  • A cultivar name that got mixed up with the species name

Don’t let this discourage you from exploring the wonderful world of native plants! There are thousands of amazing, verified species waiting to transform your garden into a thriving ecosystem for local wildlife.

Moving Forward with Confidence

While Silybum eburneum might not be real, your gardening journey certainly is. Use this as an opportunity to double-check your plant sources and build relationships with local native plant societies. They’re fantastic resources for finding plants that actually exist and will thrive in your specific area.

Remember: the best gardens are built on reliable information and well-chosen plants. Sometimes that means discovering that a plant on your wish list doesn’t actually exist – and that’s perfectly okay!

Silybum Eburneum

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

Silybum Adans. - milkthistle

Species

Silybum eburneum Coss. & Durieu

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