North America Native Plant

San Pedro Ticktrefoil

Botanical name: Desmodium batocaulon

USDA symbol: DEBA3

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Meibomia batocaulis (A. Gray) Kuntze (MEBA6)   

San Pedro Ticktrefoil: A Southwestern Native Worth Knowing If you’re passionate about native plants but find yourself stumbling over the name Desmodium batocaulon, you’re not alone! This lesser-known southwestern native goes by the much friendlier common name of San Pedro ticktrefoil, and while it might not be the star of ...

San Pedro Ticktrefoil: A Southwestern Native Worth Knowing

If you’re passionate about native plants but find yourself stumbling over the name Desmodium batocaulon, you’re not alone! This lesser-known southwestern native goes by the much friendlier common name of San Pedro ticktrefoil, and while it might not be the star of every garden center, it’s definitely worth getting acquainted with.

What Exactly Is San Pedro Ticktrefoil?

San Pedro ticktrefoil is a native perennial forb that belongs to the legume family. Now, before your eyes glaze over at the word forb, let me translate: it’s basically a non-woody flowering plant that comes back year after year. Think of it as the herbaceous cousin of shrubs and trees – it’s got all the charm of a wildflower with the reliability of a perennial.

You might also see this plant listed under its botanical synonym Meibomia batocaulis in older references, but Desmodium batocaulon is the name that stuck in modern botanical circles.

Where Does It Call Home?

This ticktrefoil is a true southwestern native, naturally occurring in Arizona, New Mexico, and Texas. It’s perfectly adapted to the unique conditions of this region, having evolved alongside the local ecosystem for thousands of years.

Why Consider San Pedro Ticktrefoil for Your Garden?

Here’s where I need to be honest with you – San Pedro ticktrefoil is one of those botanical wallflowers that hasn’t received much attention in horticultural circles. While we know it’s a legitimate native species with a rightful place in southwestern ecosystems, detailed growing information is surprisingly scarce.

However, here’s what we can reasonably expect based on its plant family and native habitat:

  • Native credentials: As a true native, it supports local ecosystems and wildlife
  • Legume benefits: Like other members of the pea family, it likely helps fix nitrogen in the soil
  • Drought adaptation: Being native to the Southwest, it’s undoubtedly adapted to arid conditions
  • Perennial nature: Once established, it should return year after year

The Honest Truth About Growing It

I wish I could give you a detailed care guide with specific soil requirements, watering schedules, and companion planting suggestions. The reality is that San Pedro ticktrefoil falls into that category of native plants that are scientifically documented but horticulturally under-explored.

If you’re determined to grow this species (and kudos to you for wanting to try something truly native and unusual!), your best approach would be:

  • Source seeds or plants from native plant societies or specialized native plant nurseries
  • Mimic its natural habitat conditions as closely as possible
  • Provide well-draining soil and minimal supplemental water once established
  • Be patient and observant as you learn its preferences

Alternative Native Options

If you love the idea of native legumes but want something with more established growing information, consider these southwestern natives:

  • Prairie bundleflower (Desmanthus illinoensis)
  • Desert willow (Chilopsis linearis)
  • Fairy duster (Calliandra eriophylla)
  • Ghost plant or desert lupine (Lupinus sparsiflorus)

The Bottom Line

San Pedro ticktrefoil represents one of those fascinating gaps in our horticultural knowledge – a legitimate native species that deserves more attention and study. While it might not be the easiest plant to grow or find information about, it’s exactly the kind of species that adventurous native plant gardeners help bring into cultivation.

If you decide to take on the challenge of growing San Pedro ticktrefoil, you’ll be participating in the important work of expanding our understanding of native plant cultivation. Just remember to source your plants responsibly and be prepared for some trial-and-error learning along the way!

San Pedro 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 batocaulon A. Gray - San Pedro ticktrefoil

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