North America Non-native Plant

Cymophora

Botanical name: Cymophora accedens

USDA symbol: CYAC7

Life cycle: annual

Habit: forb

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

Synonyms: Tridax accedens S.F. Blake (TRAC2)   

Cymophora: A Lesser-Known Annual Forb If you’ve stumbled across the name cymophora in your gardening research, you’ve discovered one of botany’s more mysterious characters. Cymophora accedens is an annual forb that has quietly made its way into Maryland’s plant communities, though it remains largely unknown to most gardeners and even ...

Cymophora: A Lesser-Known Annual Forb

If you’ve stumbled across the name cymophora in your gardening research, you’ve discovered one of botany’s more mysterious characters. Cymophora accedens is an annual forb that has quietly made its way into Maryland’s plant communities, though it remains largely unknown to most gardeners and even many botanists.

What Is Cymophora?

Cymophora accedens belongs to that humble category of plants called forbs – essentially, non-woody flowering plants that complete their entire life cycle in a single growing season. Think of it as nature’s version of a seasonal guest: it arrives, does its thing, sets seed, and then bows out until the following year.

This particular species goes by the synonym Tridax accedens, which might ring a bell for those familiar with tropical plant families. The name change reflects the ongoing work botanists do to better understand plant relationships and classifications.

Where You’ll Find It

Currently, cymophora has been documented growing in Maryland, where it has established itself as a non-native resident. Unlike some introduced plants that struggle to survive without human intervention, this species has proven capable of reproducing and persisting on its own in the wild.

The Gardening Perspective

Here’s where things get interesting – or perhaps frustrating, depending on how you look at it. Cymophora accedens is something of an enigma in the gardening world. Despite being present in the United States, there’s remarkably little information available about:

  • Its specific growing requirements
  • Aesthetic qualities and garden performance
  • Benefits to pollinators or wildlife
  • Propagation methods
  • Suitable hardiness zones

This lack of cultivation information isn’t necessarily a red flag – it likely just means the plant hasn’t caught the attention of horticulturists or hasn’t proven particularly noteworthy for garden use.

Should You Grow It?

Given the limited information available about cymophora’s garden performance and ecological impact, most gardeners would be better served by choosing well-documented native alternatives. Maryland has numerous beautiful native annual forbs that offer proven benefits to local ecosystems and reliable garden performance.

Some excellent native Maryland annuals to consider instead include:

  • Plains coreopsis (Coreopsis tinctoria)
  • Partridge pea (Chamaecrista fasciculata)
  • Annual sunflower (Helianthus annuus)
  • Jewels of Opar (Talinum paniculatum)

The Bottom Line

While cymophora might be an interesting botanical footnote, it’s not a plant that most gardeners need to seek out. The gardening world is full of well-understood, readily available plants that offer clear benefits to both gardeners and local ecosystems. Sometimes the most mysterious plants are mysterious for a reason – they simply don’t have much to offer the average garden.

If you’re passionate about growing unusual or uncommon plants, focus your energy on rare native species that could benefit from cultivation and conservation efforts. Your garden – and local wildlife – will thank you for it.

Cymophora

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

Cymophora B.L. Rob. - cymophora

Species

Cymophora accedens (S.F. Blake) B.L. Turner & A. Powell - cymophora

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