North America Native Plant

Marsh-elder

Botanical name: Hedosyne

USDA symbol: HEDOS

Life cycle: annual

Habit: subshrub

Native status: Native to the lower 48 states  

Marsh-Elder (Hedosyne): A Mysterious Native Plant If you’ve stumbled across the name marsh-elder in reference to the plant Hedosyne, you’ve discovered one of botany’s more elusive characters. This annual forb herb is listed as native to the southwestern United States, but information about this particular species remains surprisingly scarce in ...

Marsh-Elder (Hedosyne): A Mysterious Native Plant

If you’ve stumbled across the name marsh-elder in reference to the plant Hedosyne, you’ve discovered one of botany’s more elusive characters. This annual forb herb is listed as native to the southwestern United States, but information about this particular species remains surprisingly scarce in mainstream horticultural literature.

What We Know About This Native Plant

Hedosyne, commonly called marsh-elder, is classified as an annual forb herb native to the lower 48 states. As a forb, it’s a vascular plant that lacks significant woody tissue above ground level – think of it as neither a grass nor a woody shrub, but something in between that completes its entire life cycle in just one growing season.

Where You’ll Find It Growing Wild

This native plant calls the American Southwest home, with documented populations in Arizona, New Mexico, and Texas. The geographic distribution suggests it’s adapted to the unique growing conditions of this region, likely thriving in areas that experience hot summers and variable precipitation patterns.

The Challenge of Growing Hedosyne

Here’s where things get interesting (and a bit frustrating for curious gardeners): reliable growing information for Hedosyne is remarkably limited. While we know it’s an annual herb that’s native to southwestern states, specific details about its preferred growing conditions, care requirements, and garden performance remain elusive.

What This Means for Your Garden

If you’re interested in adding this native plant to your landscape, you’ll need to do some detective work. Consider these approaches:

  • Contact local native plant societies in Arizona, New Mexico, or Texas for region-specific knowledge
  • Reach out to botanical gardens or universities in the Southwest that specialize in native plants
  • Look for seed sources from reputable native plant suppliers in the region

Alternative Native Options

While you’re researching Hedosyne, consider these well-documented native alternatives that share similar characteristics or regional origins:

  • Other native forbs from the Southwest that thrive as annuals
  • Established native wildflowers with known garden performance
  • Regional natives recommended by local extension services

The Bottom Line

Hedosyne represents an intriguing puzzle in the native plant world – a species that’s documented as native but remains largely mysterious in terms of cultivation and garden use. While this might frustrate immediate gardening plans, it also presents an opportunity to contribute to botanical knowledge if you do encounter or successfully grow this plant.

For now, your best bet is connecting with regional experts and native plant enthusiasts who might have hands-on experience with this elusive marsh-elder. Sometimes the most rewarding garden adventures begin with a little mystery!

Marsh-elder

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

Hedosyne Strother - marsh-elder

Species

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