North America Non-native Plant

Rhynchosia Densiflora Chrysadenia

Botanical name: Rhynchosia densiflora chrysadenia

USDA symbol: RHDEC

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

Synonyms: Rhynchosia chrysadenia Taub. (RHCH11)   

Rhynchosia densiflora chrysadenia: A Mystery Plant in the Legume Family If you’ve stumbled across the name Rhynchosia densiflora chrysadenia in your plant research, you’re not alone in feeling puzzled. This botanical name represents one of gardening’s more elusive characters – a plant that exists in scientific literature but remains shrouded ...

Rhynchosia densiflora chrysadenia: A Mystery Plant in the Legume Family

If you’ve stumbled across the name Rhynchosia densiflora chrysadenia in your plant research, you’re not alone in feeling puzzled. This botanical name represents one of gardening’s more elusive characters – a plant that exists in scientific literature but remains shrouded in mystery for most gardeners and even botanists.

What We Know (And Don’t Know)

Rhynchosia densiflora chrysadenia belongs to the legume family, making it a cousin to beans, peas, and other nitrogen-fixing plants. The genus Rhynchosia includes various species commonly known as snoutbeans or dollarweeds, typically featuring bright yellow flowers and heart-shaped leaves. However, specific information about this particular subspecies or variety is remarkably scarce.

The plant has a documented synonym – Rhynchosia chrysadenia Taub. – but even this alternative name doesn’t yield much additional information about its characteristics or growing requirements.

The Challenge of Obscure Native Plants

Unfortunately, detailed information about this plant’s native range, appearance, growing conditions, and garden suitability remains unknown. This isn’t uncommon in the plant world – many species and subspecies exist in scientific literature without comprehensive cultivation information readily available to home gardeners.

What This Means for Gardeners

If you’re interested in growing Rhynchosia densiflora chrysadenia, you’ll face some unique challenges:

  • Limited availability through traditional nursery channels
  • Lack of established growing guidelines
  • Uncertain native status and geographic distribution
  • Unknown invasive or conservation status

Alternative Approaches

Rather than pursuing this mysterious plant, consider exploring better-documented members of the Rhynchosia genus or other native legumes in your area. Many related species offer similar ecological benefits, including nitrogen fixation and potential pollinator support, while providing clear growing instructions and known garden performance.

If you’re specifically researching this plant for academic or conservation purposes, consulting botanical databases, herbarium records, or contacting botanical institutions may yield more detailed information than what’s currently available to the general gardening public.

The Bottom Line

Rhynchosia densiflora chrysadenia represents the fascinating but frustrating reality of plant taxonomy – not every named species comes with a gardener’s guide attached. While the mystery surrounding this plant makes it intriguing, it also makes it impractical for most gardening applications.

For now, this remains a plant better left to botanical researchers than backyard gardeners. If you’re drawn to native legumes, focus your energy on well-documented species that will reward your gardening efforts with reliable results and clear growing guidance.

Rhynchosia Densiflora Chrysadenia

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

Rhynchosia Lour. - snoutbean

Species

Rhynchosia densiflora (Roth) DC.

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