North America Non-native Plant

Shield Clover

Botanical name: Trifolium clypeatum

USDA symbol: TRCL2

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

Shield Clover: The Mystery Plant That’s Got Gardeners Scratching Their Heads If you’ve stumbled across the name shield clover or its botanical moniker Trifolium clypeatum in your gardening research, you’re probably wondering what exactly this plant is and whether it belongs in your garden. Well, grab a cup of tea ...

Shield Clover: The Mystery Plant That’s Got Gardeners Scratching Their Heads

If you’ve stumbled across the name shield clover or its botanical moniker Trifolium clypeatum in your gardening research, you’re probably wondering what exactly this plant is and whether it belongs in your garden. Well, grab a cup of tea because we’re about to dive into one of gardening’s more puzzling mysteries.

What is Shield Clover?

Shield clover (Trifolium clypeatum) is supposedly a member of the clover family, but here’s where things get interesting – and by interesting, I mean frustratingly elusive. This plant is so obscure that even seasoned botanists and native plant databases struggle to provide concrete information about it. It’s like the plant equivalent of Bigfoot: talked about but rarely seen in reliable sources.

The Great Shield Clover Hunt

Unlike its well-known cousins like white clover (Trifolium repens) or red clover (Trifolium pratense), shield clover seems to exist in a botanical twilight zone. This raises several possibilities:

  • It could be an extremely rare or localized species
  • The name might be a taxonomic synonym that’s fallen out of current use
  • There may be some confusion with identification or naming

Should You Plant It?

Here’s the honest truth: without reliable information about shield clover’s native status, growing requirements, or ecological impact, it’s nearly impossible to recommend for or against planting it. This uncertainty is actually a valuable lesson for gardeners – not every plant name you encounter will lead to a clear path forward.

Better Alternatives for Your Garden

If you’re looking for native clovers to support pollinators and add nitrogen to your soil, consider these well-documented alternatives:

  • Purple prairie clover (Dalea purpurea) – a stunning native with purple flower spikes
  • White prairie clover (Dalea candida) – elegant white blooms beloved by butterflies
  • Buffalo clover (Trifolium reflexum) – a native clover with distinctive reflexed flower heads

These alternatives offer the benefits you might expect from a clover – nitrogen fixation, pollinator support, and ground coverage – with the added bonus of well-documented growing information.

The Takeaway for Curious Gardeners

The mystery of shield clover serves as a reminder that gardening is part art, part science, and part detective work. When you encounter unfamiliar plant names, especially those lacking reliable information, it’s often better to choose well-documented alternatives that will thrive in your garden and support local ecosystems.

If you believe you’ve encountered shield clover in the wild or have reliable information about this elusive species, consider reaching out to local botanical societies or native plant groups. Your observations could help solve this green mystery once and for all!

Shield Clover

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Trifolium L. - clover

Species

Trifolium clypeatum L. - shield clover

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