North America Native Plant

Siskiyou Mountain Owl’s-clover

Botanical name: Orthocarpus cuspidatus cuspidatus

USDA symbol: ORCUC3

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Siskiyou Mountain Owl’s-Clover: A Rare Gem for Native Plant Enthusiasts If you’re passionate about native wildflowers and love supporting rare plants, Siskiyou Mountain owl’s-clover might just capture your heart. This charming annual wildflower, scientifically known as Orthocarpus cuspidatus cuspidatus, is a true treasure from the mountainous regions of the Pacific ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3T4: 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. ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 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. ⚘

Siskiyou Mountain Owl’s-Clover: A Rare Gem for Native Plant Enthusiasts

If you’re passionate about native wildflowers and love supporting rare plants, Siskiyou Mountain owl’s-clover might just capture your heart. This charming annual wildflower, scientifically known as Orthocarpus cuspidatus cuspidatus, is a true treasure from the mountainous regions of the Pacific Northwest.

What Makes This Plant Special?

Siskiyou Mountain owl’s-clover is a delicate annual forb that belongs to a fascinating group of plants. As a forb, it’s a non-woody plant that completes its entire life cycle in just one growing season. Don’t let its small stature fool you – this little wildflower packs a punch when it comes to adding authentic regional character to your garden.

Where Does It Call Home?

This native beauty is found exclusively in California and Oregon, with its heart in the Siskiyou Mountain region that gives it its common name. As a plant native to the lower 48 states, it’s perfectly adapted to the unique climate and soil conditions of its mountain home.

Important Conservation Note

Here’s something every responsible gardener should know: Siskiyou Mountain owl’s-clover has a Global Conservation Status of S5T3T4, which indicates some level of conservation concern. This means that while you can grow this beautiful plant, it’s crucial to source seeds or plants only from reputable native plant nurseries that practice ethical collection methods. Never collect seeds from wild populations!

Why Grow Siskiyou Mountain Owl’s-Clover?

There are several compelling reasons to include this rare wildflower in your garden:

  • Support conservation: By growing responsibly sourced plants, you’re helping preserve genetic diversity
  • Authentic regional flora: Perfect for California and Oregon native plant gardens
  • Pollinator magnet: Attracts native bees and other beneficial insects
  • Low maintenance: Once established, it thrives with minimal care
  • Unique beauty: Adds delicate color and texture to wildflower plantings

Garden Design Ideas

Siskiyou Mountain owl’s-clover works beautifully in several garden settings:

  • Native plant collections and botanical gardens
  • Rock gardens and alpine plant displays
  • Naturalistic wildflower meadows
  • Xerophytic (dry) garden designs
  • Educational gardens focused on rare or endangered plants

Growing Conditions and Care

This mountain native prefers conditions that mimic its natural habitat:

  • Sunlight: Full sun exposure
  • Soil: Well-drained soils; avoid rich, fertile conditions
  • Water: Moderate water during germination, then drought-tolerant
  • Climate: Suitable for USDA hardiness zones 7-9

Planting and Care Tips

Growing Siskiyou Mountain owl’s-clover successfully requires understanding its annual nature:

  • Timing: Direct seed in fall for spring germination
  • Soil prep: Ensure excellent drainage; amend heavy soils with sand or gravel
  • Watering: Provide regular moisture during germination, then reduce significantly
  • Maintenance: Allow plants to self-seed for natural populations
  • Patience: As an annual, expect to wait for next year’s display

Supporting Wildlife

Like many native wildflowers, Siskiyou Mountain owl’s-clover provides valuable resources for local wildlife. Its flowers attract native pollinators, particularly small native bees that have co-evolved with regional flora. By including this plant in your garden, you’re supporting the intricate web of relationships that make healthy ecosystems thrive.

The Bottom Line

Siskiyou Mountain owl’s-clover is a wonderful choice for gardeners who want to make a positive impact on plant conservation while enjoying a beautiful, authentic native wildflower. Just remember the golden rule: always source your plants or seeds responsibly from ethical suppliers. With proper care and the right growing conditions, you can help ensure this rare mountain beauty continues to grace gardens and wild spaces for generations to come.

Ready to add some rare Pacific Northwest charm to your garden? Start by connecting with reputable native plant societies in California and Oregon – they’re often the best source for finding ethically sourced seeds of special plants like this one.

Siskiyou Mountain Owl’s-clover

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

Orthocarpus Nutt. - owl's-clover

Species

Orthocarpus cuspidatus Greene - toothed owl's-clover

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