North America Native Plant

Coast Range Triteleia

Botanical name: Triteleia lugens

USDA symbol: TRLU4

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Brodiaea lugens (Greene) Baker (BRLU)  âš˜  Calliprora ixioides (W.T. Aiton) Greene var. lugens (Greene) Abrams (CAIXL)   

Coast Range Triteleia: A Rare California Native Worth Protecting Meet the Coast Range triteleia (Triteleia lugens), a charming little bulb that’s as special as it is scarce. This delicate California native might not be the showiest flower in the garden, but what it lacks in drama, it more than makes ...

Rare plant alert!

Region: Conservation status by state

Status: S3: Status is uncertain but is somewhere between the following rankings: 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 ⚘

Coast Range Triteleia: A Rare California Native Worth Protecting

Meet the Coast Range triteleia (Triteleia lugens), a charming little bulb that’s as special as it is scarce. This delicate California native might not be the showiest flower in the garden, but what it lacks in drama, it more than makes up for in ecological importance and quiet beauty.

A True California Original

The Coast Range triteleia is a perennial forb native exclusively to California’s Coast Ranges, particularly thriving in Napa, Sonoma, and Lake counties. This herbaceous plant emerges from underground bulbs each year, producing slender stems topped with clusters of small, tubular flowers in soft whites and pale yellows. Think of it as nature’s version of a understated elegance – no flashy petals here, just pure, simple charm.

Why This Little Beauty Matters (And Why You Should Care)

Here’s where things get serious: Coast Range triteleia holds a Global Conservation Status of S3, meaning it’s considered vulnerable. With only 21 to 100 known occurrences and an estimated 3,000 to 10,000 individuals remaining in the wild, this isn’t just any garden plant – it’s a conservation priority.

But don’t let its rarity scare you away from growing it! In fact, responsible cultivation can be part of the solution. Just make sure you’re sourcing your bulbs from reputable native plant nurseries that propagate their own stock rather than wild-collecting.

What Makes It Garden-Worthy

Despite its modest appearance, Coast Range triteleia brings several benefits to your garden:

  • Attracts native pollinators including bees and butterflies
  • Perfectly adapted to California’s Mediterranean climate
  • Requires minimal water once established
  • Adds authentic local character to native plant gardens
  • Goes completely dormant in summer, requiring no care during dry months

Growing Coast Range Triteleia Successfully

This little bulb is surprisingly easy to grow once you understand its natural rhythm. Like many California natives, it follows a Mediterranean schedule: active growth and flowering in winter and spring, then complete dormancy during the hot, dry summer months.

Ideal Growing Conditions:

  • Full sun to partial shade
  • Well-draining soil (drainage is absolutely critical)
  • USDA Hardiness Zones 8-10
  • Winter and spring moisture, dry summers

Planting and Care Tips

The secret to success with Coast Range triteleia is thinking like a California native. Plant bulbs in fall when the first rains arrive – this mimics their natural growing cycle. Choose a spot with excellent drainage; soggy soil is the kiss of death for these bulbs.

During the growing season (roughly October through May), provide moderate water. But here’s the crucial part: once the foliage begins to yellow and die back in late spring, stop watering almost entirely. Let the plant go completely dormant through summer and early fall. It’s not dead – it’s just taking a very long nap!

Perfect Garden Companions

Coast Range triteleia plays well with other California natives that share its summer-dry preference. Try pairing it with native bunch grasses, California poppies, or other drought-tolerant bulbs like blue-eyed grass. It’s particularly stunning in naturalized meadow settings or rock gardens where its delicate flowers can shine without competition from larger, showier plants.

A Conservation Success Story in Your Garden

By choosing to grow Coast Range triteleia responsibly, you’re not just adding a beautiful native to your garden – you’re participating in conservation. Every garden that successfully grows this species helps maintain genetic diversity and reduces pressure on wild populations.

Just remember: always source your bulbs from reputable native plant nurseries that propagate their own stock. Never collect from the wild, and consider sharing seeds or offsets with other native plant enthusiasts to help spread this wonderful species responsibly.

Coast Range triteleia may be small and humble, but it represents something much larger: our connection to California’s unique natural heritage and our responsibility to protect it for future generations.

Coast Range Triteleia

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Liliidae

Order

Liliales

Family

Liliaceae Juss. - Lily family

Genus

Triteleia Douglas ex Lindl. - triteleia

Species

Triteleia lugens Greene - Coast Range triteleia

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