North America Native Plant

Slender Bird’s Beak

Botanical name: Cordylanthus tenuis tenuis

USDA symbol: COTET2

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Cordylanthus bolanderi (A. Gray) Pennell (COBO5)  âš˜  Cordylanthus pilosus A. Gray ssp. bolanderi (A. Gray) Munz (COPIB)   

Slender Bird’s Beak: A Quirky Native with a Secret Meet the slender bird’s beak (Cordylanthus tenuis tenuis), a fascinating little native annual that’s definitely not your average garden flower. This unassuming plant has a few tricks up its sleeve that make it both intriguing and challenging for home gardeners. If ...

Slender Bird’s Beak: A Quirky Native with a Secret

Meet the slender bird’s beak (Cordylanthus tenuis tenuis), a fascinating little native annual that’s definitely not your average garden flower. This unassuming plant has a few tricks up its sleeve that make it both intriguing and challenging for home gardeners. If you’re drawn to unusual native species and love a good botanical mystery, this might just capture your interest!

What Makes Slender Bird’s Beak Special?

Don’t let the name fool you – this plant doesn’t actually look much like a bird’s beak at first glance. The slender bird’s beak is a native annual forb that grows throughout California, Nevada, and Oregon. As a true native of the western United States, it plays an important role in local ecosystems, even if it doesn’t always steal the show in the looks department.

This plant goes by a couple of scientific aliases too, including Cordylanthus bolanderi and Cordylanthus pilosus subspecies bolanderi, so don’t be surprised if you see it listed under different names in various resources.

The Plot Twist: It’s a Plant Parasite!

Here’s where things get really interesting – slender bird’s beak is what botanists call a hemiparasite. This means it can photosynthesize like other plants, but it also taps into the roots of nearby host plants (typically grasses and other herbs) to steal some nutrients. It’s like having a garden roommate who can cook but still raids your fridge!

This parasitic lifestyle makes slender bird’s beak both ecologically fascinating and practically challenging for home gardeners.

Garden Appeal and Landscape Role

Let’s be honest – slender bird’s beak isn’t going to win any beauty contests. This annual grows as a small, narrow-leaved plant with tiny tubular flowers that are typically yellow or purple-tinged. Its appeal lies more in its ecological value than its ornamental qualities.

In the right setting, it can play several important roles:

  • Supporting native pollinators, particularly small native bees
  • Adding authenticity to restoration projects and native plant collections
  • Providing habitat complexity in wildlife gardens
  • Contributing to the natural plant communities of dry, rocky areas

Growing Conditions and Care

If you’re still intrigued and want to try growing slender bird’s beak, here’s what you need to know. This plant thrives in USDA hardiness zones 8-10 and prefers:

  • Dry, well-draining soils (sandy or rocky conditions are ideal)
  • Full sun exposure
  • Minimal water once established
  • The presence of suitable host plants (grasses and native herbs)

The Reality Check: Why This Isn’t for Everyone

Before you get too excited, let’s talk about the elephant in the room. Slender bird’s beak is notoriously difficult to cultivate in typical garden settings. Its parasitic nature means it needs compatible host plants nearby, and the complex relationships involved make successful establishment quite challenging.

This plant is best suited for:

  • Advanced native plant enthusiasts
  • Restoration projects in suitable habitats
  • Specialized collections focusing on unusual native species
  • Areas where it can naturally establish with minimal intervention

Planting and Propagation Tips

If you’re determined to try growing slender bird’s beak, your best bet is direct seeding in fall or early spring. The seeds need to be planted in areas where suitable host plants are already established. Success rates are typically low in conventional garden settings, so manage your expectations accordingly.

Consider this more of a restoration project than traditional gardening – you’re essentially trying to recreate natural conditions rather than forcing the plant into an artificial environment.

The Bottom Line

Slender bird’s beak is a fascinating example of the complex relationships that exist in native plant communities. While it’s not practical for most home gardens, it represents the kind of specialized native species that make our ecosystems so intricate and wonderful.

If you’re passionate about supporting native biodiversity and have the right conditions, it might be worth a try. Just remember that this is definitely an advanced project best suited for those who appreciate ecological complexity over immediate visual impact. For most gardeners, supporting this species means preserving and restoring the natural habitats where it already thrives!

Slender Bird’s Beak

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

Scrophulariales

Family

Scrophulariaceae Juss. - Figwort family

Genus

Cordylanthus Nutt. ex Benth. - bird's-beak

Species

Cordylanthus tenuis A. Gray - slender bird's beak

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