North America Non-native Plant

Ceratotheca

Botanical name: Ceratotheca

USDA symbol: CERAT6

Life cycle: annual

Habit: forb

Native status: Non-native, reproduces and persists in the wild in the lower 48 states  

Ceratotheca: An Uncommon Annual with Limited Garden Presence If you’ve stumbled across the name Ceratotheca in your plant research, you’re dealing with a rather obscure genus that most gardeners haven’t encountered. This annual forb has a story that’s more interesting for what we don’t know about it than what we ...

Ceratotheca: An Uncommon Annual with Limited Garden Presence

If you’ve stumbled across the name Ceratotheca in your plant research, you’re dealing with a rather obscure genus that most gardeners haven’t encountered. This annual forb has a story that’s more interesting for what we don’t know about it than what we do.

What is Ceratotheca?

Ceratotheca is an annual flowering plant that falls into the category of forbs – those non-woody plants that add herbaceous interest to landscapes. As a vascular plant without significant woody tissue, it completes its entire life cycle in a single growing season, making it quite different from the perennial natives many gardeners prefer.

Where You’ll Find It

In the United States, Ceratotheca has established itself in Florida, where it grows and reproduces without human assistance. This makes it what botanists call a naturalized species – not native to North America, but able to survive and spread on its own in our ecosystems.

The Mystery Plant Problem

Here’s where things get interesting (and a bit frustrating for curious gardeners): Ceratotheca is something of a horticultural mystery. While we know it exists and can survive in Florida’s climate, detailed information about its appearance, specific growing requirements, and garden performance is remarkably scarce in mainstream gardening resources.

What we do know is limited:

  • It’s an annual that completes its life cycle in one year
  • It grows as a forb with non-woody stems
  • It has successfully established in Florida’s environment
  • Its invasive status remains unclear

Should You Grow Ceratotheca?

The honest answer is: it’s complicated. Without clear information about its growth habits, appearance, or potential impact on local ecosystems, it’s difficult to make a strong recommendation either way. The lack of readily available seeds or plants in the nursery trade suggests it’s not considered a desirable garden plant by most standards.

Better Alternatives for Your Garden

Instead of puzzling over this enigmatic annual, consider these proven native alternatives that will give you reliable results and support local wildlife:

  • For Florida gardeners: Blanket flower (Gaillardia), Wild bergamot (Monarda), or native sunflowers
  • For annual color: Native zinnias, cosmos, or locally native wildflower mixes
  • For forb-like texture: Native asters, goldenrod, or wild lupine

The Bottom Line

Ceratotheca represents one of those plant puzzles that occasionally surface in the gardening world – species that exist and persist but don’t quite fit into our typical gardening categories. While it’s not flagged as invasive, the lack of horticultural information makes it a risky choice for intentional cultivation.

Your garden energy is probably better spent on well-documented native plants that will provide reliable beauty, clear growing instructions, and known benefits to local pollinators and wildlife. Sometimes the most responsible gardening choice is to admire a plant’s mystery from afar while choosing better-understood species for your landscape.

Ceratotheca

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

Scrophulariales

Family

Pedaliaceae R. Br. - Sesame family

Genus

Ceratotheca Endl. - ceratotheca

Species

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