North America Native Plant

Crown Tickseed

Botanical name: Coreopsis nuecensis

USDA symbol: CONU3

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Crown Tickseed: A Mysterious Native Annual Worth Investigating Meet crown tickseed (Coreopsis nuecensis), one of the more enigmatic members of the beloved Coreopsis family. While most gardeners are familiar with popular cousins like lanceleaf coreopsis or threadleaf coreopsis, this particular species flies under the radar – and for good reason. ...

Crown Tickseed: A Mysterious Native Annual Worth Investigating

Meet crown tickseed (Coreopsis nuecensis), one of the more enigmatic members of the beloved Coreopsis family. While most gardeners are familiar with popular cousins like lanceleaf coreopsis or threadleaf coreopsis, this particular species flies under the radar – and for good reason. Crown tickseed presents both intrigue and challenges for the curious native plant gardener.

What Makes Crown Tickseed Special?

Crown tickseed is classified as an annual forb, meaning it completes its entire life cycle in one growing season. Like other members of the Coreopsis genus, it’s an herbaceous plant without woody stems, storing its energy in underground parts and producing fresh growth each year from ground level or below.

As a native species to the lower 48 states, crown tickseed has earned its place in the American landscape naturally, developing alongside local wildlife and fitting into established ecosystems.

Where Does Crown Tickseed Grow?

Here’s where things get interesting – and a bit puzzling. Crown tickseed is documented as growing in three rather disconnected states: Louisiana, Michigan, and Texas. This unusual distribution pattern is somewhat atypical for most plant species, which tend to have more geographically logical ranges.

The Challenge: Limited Information

Here’s the honest truth about crown tickseed: reliable, detailed growing information is surprisingly scarce. Unlike its well-documented Coreopsis relatives, specific details about crown tickseed’s appearance, growing requirements, and garden performance are difficult to find in standard botanical and horticultural references.

This scarcity of information presents both a challenge and an opportunity for adventurous gardeners interested in lesser-known native species.

Should You Grow Crown Tickseed?

The decision to grow crown tickseed depends on your gardening philosophy and goals:

  • For the plant explorer: If you enjoy growing unusual species and don’t mind some uncertainty, crown tickseed could be an interesting addition
  • For reliable gardens: You might want to stick with better-documented Coreopsis species like C. lanceolata or C. verticillata
  • For native plant enthusiasts: The unclear documentation makes it difficult to verify true native status in your specific region

Alternative Coreopsis Options

If you’re drawn to the Coreopsis family but want more reliable options, consider these well-documented native alternatives:

  • Lanceleaf coreopsis (C. lanceolata): Bright yellow flowers, easy to grow
  • Plains coreopsis (C. tinctoria): Colorful annual with red and yellow blooms
  • Threadleaf coreopsis (C. verticillata): Delicate foliage with abundant flowers

Growing Tips (General Coreopsis Guidance)

While specific information about crown tickseed is limited, most Coreopsis species share similar preferences:

  • Full sun exposure
  • Well-draining soil
  • Moderate water needs once established
  • Tolerance for poor soils
  • Benefit from deadheading to encourage more blooms

The Bottom Line

Crown tickseed represents one of gardening’s interesting mysteries – a plant that exists in botanical records but lacks the detailed documentation we’ve come to expect. While this makes it challenging for practical gardening purposes, it also highlights the vast diversity of native plants still waiting to be fully understood and appreciated.

For most gardeners, choosing well-documented Coreopsis species will provide better results and more reliable information. However, if you’re passionate about plant conservation and documentation, crown tickseed might deserve a spot in your experimental garden bed – just don’t expect detailed growing guides along the way!

Crown Tickseed

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

Coreopsis L. - tickseed

Species

Coreopsis nuecensis A. Heller - crown tickseed

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