North America Native Plant

Western Trailing Ticktrefoil

Botanical name: Desmodium procumbens var. exiguum

USDA symbol: DEPRE

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Western Trailing Ticktrefoil: A Lesser-Known Native Arizona Annual If you’re looking to add some native charm to your Arizona garden, you might want to consider the western trailing ticktrefoil (Desmodium procumbens var. exiguum). This little-known native annual offers gardeners a chance to support local ecosystems while adding an authentic touch ...

Western Trailing Ticktrefoil: A Lesser-Known Native Arizona Annual

If you’re looking to add some native charm to your Arizona garden, you might want to consider the western trailing ticktrefoil (Desmodium procumbens var. exiguum). This little-known native annual offers gardeners a chance to support local ecosystems while adding an authentic touch of the Southwest to their landscape.

What Is Western Trailing Ticktrefoil?

Western trailing ticktrefoil is a native annual forb that calls Arizona home. As a member of the legume family, this herbaceous plant lacks significant woody tissue and completes its entire life cycle within a single growing season. Like other forbs, it’s a non-woody vascular plant that produces flowers and seeds before dying back at the end of the season.

Where Does It Grow?

This native beauty is found naturally in Arizona, making it perfectly adapted to the unique growing conditions of the region. As a true Arizona native, it has evolved alongside local wildlife and climate patterns over thousands of years.

Why Consider Growing Western Trailing Ticktrefoil?

There are several compelling reasons to include this native annual in your garden:

  • Native authenticity: Supporting plants that naturally belong in your area helps maintain local ecological balance
  • Low maintenance potential: Native plants are typically well-adapted to local conditions once established
  • Wildlife support: Native plants provide food and habitat for local wildlife species
  • Conservation value: Growing natives helps preserve Arizona’s natural plant heritage

The Reality Check

Here’s where we need to be honest: western trailing ticktrefoil is not a well-documented garden plant. Information about its specific growing requirements, appearance, and garden performance is quite limited. This makes it more of an experimental choice for adventurous gardeners rather than a sure bet for beginners.

Growing Considerations

Since specific growing information for this variety is scarce, here’s what we can reasonably expect based on its classification and native habitat:

  • Annual nature: You’ll need to replant or allow for self-seeding each year
  • Arizona adaptation: Likely tolerant of heat and drought conditions typical of Arizona
  • Forb characteristics: Expect a low-growing, herbaceous plant rather than a shrub or tree
  • Legume benefits: As a member of the bean family, it may help improve soil nitrogen

Is This Plant Right for You?

Western trailing ticktrefoil might be perfect if you’re:

  • An experienced gardener interested in rare or uncommon natives
  • Someone passionate about Arizona’s native plant diversity
  • Willing to experiment with limited growing information
  • Interested in supporting local ecosystems

However, you might want to look elsewhere if you’re seeking a well-documented plant with established garden performance and readily available growing guides.

The Bottom Line

Western trailing ticktrefoil represents the fascinating but sometimes frustrating world of lesser-known native plants. While it offers the genuine appeal of being a true Arizona native, the limited information available makes it more suitable for gardening adventurers than those seeking predictable results.

If you’re intrigued by this plant, consider reaching out to local native plant societies, botanical gardens, or university extension services in Arizona—they may have additional insights or even seeds to share. Sometimes the most rewarding garden experiences come from taking chances on the plants that others have overlooked.

Western Trailing Ticktrefoil

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

Desmodium Desv. - ticktrefoil

Species

Desmodium procumbens (Mill.) Hitchc. - western trailing ticktrefoil

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