North America Native Plant

San Antoinio Canyon Bedstraw

Botanical name: Galium angustifolium gabrielense

USDA symbol: GAANG2

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Galium gabrielense Munz & I.M. Johnst. (GAGA2)  âš˜  Galium siccatum W. Wight var. anotinum Jeps. (GASIA)   

San Antonio Canyon Bedstraw: A Rare California Native Worth Protecting Meet San Antonio Canyon bedstraw (Galium angustifolium gabrielense), a special little plant that’s as unique as its name suggests. This rare California native is one of those plants that makes you feel like you’ve discovered a hidden treasure – mainly ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals. ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

San Antonio Canyon Bedstraw: A Rare California Native Worth Protecting

Meet San Antonio Canyon bedstraw (Galium angustifolium gabrielense), a special little plant that’s as unique as its name suggests. This rare California native is one of those plants that makes you feel like you’ve discovered a hidden treasure – mainly because you kind of have! If you’re passionate about growing truly local natives and supporting plant conservation, this bedstraw might just capture your gardening heart.

What Makes This Plant Special?

San Antonio Canyon bedstraw is a perennial forb herb, which means it’s a non-woody plant that comes back year after year. As part of the broader narrow-leaved bedstraw family, it shares the characteristic delicate appearance of its relatives, but with its own unique local adaptations that have evolved in Southern California’s specific conditions.

You might also see this plant listed under its synonyms Galium gabrielense or Galium siccatum var. anotinum in older botanical references, but Galium angustifolium gabrielense is the current accepted name.

Where Does It Call Home?

This bedstraw is a true California endemic, found naturally only in the Golden State. More specifically, as its common name hints, it’s associated with the San Antonio Canyon area, making it one of those wonderfully localized plants that tells the story of a specific place and ecosystem.

A Word About Rarity

Here’s something important to know: San Antonio Canyon bedstraw has a conservation status of S5T3, indicating that this subspecies is considered vulnerable to imperiled. This means it’s not abundant in the wild and faces potential conservation concerns. If you’re interested in growing this plant, it’s crucial to source it only from reputable nurseries that propagate from ethically collected seed or cuttings – never collect from wild populations.

Should You Grow It?

The short answer is: maybe, but with important caveats. As a rare native plant, San Antonio Canyon bedstraw represents an opportunity to participate in conservation gardening. Growing rare natives in cultivation can serve as a backup for wild populations and help maintain genetic diversity.

However, this plant comes with some challenges:

  • Very limited availability from nurseries
  • Specific growing requirements that aren’t well-documented
  • May require particular soil or microclimate conditions
  • Best suited for dedicated native plant enthusiasts

Growing Conditions (What We Know)

Unfortunately, detailed cultivation information for this specific subspecies is quite limited. Based on its natural habitat and relationship to other bedstraws, it likely prefers:

  • Well-draining soils
  • Mediterranean climate conditions
  • Possibly some protection from intense afternoon sun
  • Minimal summer water once established

The USDA hardiness zones for this plant are not well-documented, but given its Southern California origins, it’s likely suited for zones 9-10.

The Bottom Line

San Antonio Canyon bedstraw is more than just a garden plant – it’s a piece of California’s botanical heritage. While it may not be the easiest plant to find or grow, it offers dedicated native plant gardeners a chance to cultivate something truly special and contribute to conservation efforts.

If you’re interested in this rare beauty, start by contacting specialized native plant societies or botanical gardens in Southern California. They may have leads on ethical sources or propagation programs. Remember, the goal is to celebrate and protect this unique plant, not to pressure wild populations.

For gardeners seeking easier-to-grow alternatives that provide similar ecological benefits, consider other California native bedstraws or members of the madder family that are more widely available and better documented for home cultivation.

San Antoinio Canyon Bedstraw

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

Rubiales

Family

Rubiaceae Juss. - Madder family

Genus

Galium L. - bedstraw

Species

Galium angustifolium Nutt. ex A. Gray - narrowleaf bedstraw

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