North America Native Plant

Bristly Linanthus

Botanical name: Leptosiphon acicularis

USDA symbol: LEAC11

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Linanthus acicularis Greene (LIAC3)   

Bristly Linanthus: A Delicate California Native Worth Protecting Meet bristly linanthus (Leptosiphon acicularis), a charming little California native that’s as delicate as it sounds. This petite annual wildflower might not win any showiest bloom contests, but what it lacks in flashiness, it makes up for in ecological importance and understated ...

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 ⚘

Bristly Linanthus: A Delicate California Native Worth Protecting

Meet bristly linanthus (Leptosiphon acicularis), a charming little California native that’s as delicate as it sounds. This petite annual wildflower might not win any showiest bloom contests, but what it lacks in flashiness, it makes up for in ecological importance and understated beauty. If you’re passionate about supporting native biodiversity and don’t mind a plant that prefers to do its own thing, bristly linanthus could be a wonderful addition to your native garden.

What Makes Bristly Linanthus Special?

Bristly linanthus is a true California original, found exclusively within the Golden State’s diverse landscapes. As an annual forb (that’s botanist-speak for a non-woody herbaceous plant), it completes its entire life cycle in one growing season, making it a fast-acting contributor to your garden’s ecosystem.

You might also see this plant listed under its scientific synonym, Linanthus acicularis Greene, in older botanical references. But don’t let the name changes fool you – it’s the same lovely little wildflower.

Where Does It Call Home?

This California endemic has made its home throughout various regions of the state, typically favoring foothill and mountain areas where it can spread across open spaces and naturalized landscapes. Its exclusive California distribution makes it a true local treasure.

A Plant That Needs Our Help

Here’s where things get important: bristly linanthus has a Global Conservation Status of S3, which means it’s considered vulnerable. With typically only 21 to 100 occurrences and between 3,000 to 10,000 individuals remaining, this little plant needs our support. If you choose to grow bristly linanthus, please make sure you’re using responsibly sourced seeds or plants – never collect from wild populations.

Garden Appeal and Design Role

While bristly linanthus won’t overwhelm you with bold colors or dramatic height, its delicate charm lies in the details. The small, tubular flowers create a subtle carpet of color that works beautifully in:

  • Native plant gardens focused on California flora
  • Wildflower meadows and naturalized areas
  • Ground cover situations where you want something low-maintenance
  • Conservation gardens dedicated to supporting rare species

Its modest stature and self-seeding habit make it perfect for filling in gaps between larger native plants or creating gentle drifts in informal garden settings.

Growing Conditions and Care

The good news about bristly linanthus is that it’s adapted to California’s Mediterranean climate, which means it’s relatively low-maintenance once you understand its preferences:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soils – it doesn’t like wet feet
  • Water: Minimal watering once established; drought-tolerant
  • Climate zones: USDA zones 8-10, matching California’s climate patterns

Planting and Care Tips

Since bristly linanthus is an annual, growing it from seed is your best bet. Here’s how to give it the best start:

  • Direct sow seeds in fall or early spring when soil temperatures are cool
  • Barely cover seeds with soil – they need some light to germinate
  • Keep soil lightly moist until germination occurs
  • Once established, reduce watering significantly
  • Allow plants to self-seed for naturalized colonies
  • Avoid heavy fertilization – native plants prefer lean soils

Supporting Pollinators and Wildlife

Though small, the tubular flowers of bristly linanthus provide nectar for native bees and other small pollinators. By growing this native plant, you’re supporting the intricate web of relationships that keep California’s ecosystems healthy. Every little flower counts when it comes to providing resources for our native pollinator populations.

Is Bristly Linanthus Right for Your Garden?

Consider bristly linanthus if you:

  • Want to support California’s native plant diversity
  • Enjoy subtle, naturalized garden aesthetics
  • Prefer low-maintenance plants that self-seed
  • Are committed to conservation gardening
  • Have well-draining soil and can provide appropriate growing conditions

Remember, because this plant has vulnerable conservation status, growing it responsibly means sourcing seeds or plants from reputable native plant societies, botanical gardens, or specialized native plant nurseries. Never collect from wild populations – instead, become part of the solution by providing this rare beauty with safe garden habitat where it can thrive and reproduce.

Bristly linanthus may be small and unassuming, but in the world of conservation gardening, every rare native plant we successfully grow is a victory worth celebrating.

Bristly Linanthus

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

Solanales

Family

Polemoniaceae Juss. - Phlox family

Genus

Leptosiphon Benth. - leptosiphon

Species

Leptosiphon acicularis (Greene) Jeps. - bristly linanthus

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