North America Native Plant

Kahili Beggarticks

Botanical name: Bidens forbesii kahiliensis

USDA symbol: BIFOK

Life cycle: perennial

Habit: subshrub

Native status: Native to Hawaii  

Kahili Beggarticks: A Rare Hawaiian Treasure for Conservation-Minded Gardeners Meet the Kahili beggarticks (Bidens forbesii kahiliensis), a fascinating little shrub that represents one of Hawaii’s most precious botanical gems. This rare perennial plant might not be the showiest addition to your garden, but it carries something far more valuable – ...

Rare plant alert!

Region: Conservation status by state

Status: S3T1: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ 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 ⚘

Kahili Beggarticks: A Rare Hawaiian Treasure for Conservation-Minded Gardeners

Meet the Kahili beggarticks (Bidens forbesii kahiliensis), a fascinating little shrub that represents one of Hawaii’s most precious botanical gems. This rare perennial plant might not be the showiest addition to your garden, but it carries something far more valuable – the story of Hawaii’s unique ecological heritage.

What Makes Kahili Beggarticks Special?

This compact, low-growing shrub typically stays under 1.5 feet tall and never exceeds 3 feet at maturity, making it perfect for smaller spaces. As a native Hawaiian plant species, Kahili beggarticks evolved in isolation over thousands of years, developing characteristics found nowhere else on Earth.

Where Does It Come From?

Kahili beggarticks is endemic to Hawaii, meaning it naturally occurs only in the Hawaiian Islands and nowhere else in the world. This geographic restriction makes it particularly special – and particularly vulnerable.

A Conservation Priority Plant

Here’s where things get serious: Kahili beggarticks has a Global Conservation Status of S3T1, indicating it’s quite rare. This rarity status means that if you’re lucky enough to find this plant available, you’ll want to ensure it comes from responsibly sourced material – never collected from wild populations.

Should You Grow Kahili Beggarticks?

If you’re a conservation-minded gardener in Hawaii, absolutely! Growing rare native plants like Kahili beggarticks serves several important purposes:

  • Helps preserve Hawaii’s unique botanical heritage
  • Supports local ecosystem restoration efforts
  • Creates living gene banks outside of wild populations
  • Connects you to Hawaii’s natural history

The Reality of Growing Rare Plants

Let’s be honest – growing Kahili beggarticks won’t be like planting marigolds. Information about its specific growing requirements, propagation methods, and care instructions is limited due to its rarity. This makes it more of an adventure for experienced native plant enthusiasts rather than beginning gardeners.

Garden Design Considerations

With its compact, low-growing habit, Kahili beggarticks would work well in:

  • Native Hawaiian plant collections
  • Conservation gardens
  • Educational landscapes
  • Small-space native plantings

Growing Tips and Considerations

Since specific growing information for this subspecies is limited, your best approach would be to:

  • Contact local native plant societies or botanical gardens for guidance
  • Start with general growing conditions suitable for Hawaiian Bidens species
  • Provide well-draining soil and appropriate sun exposure
  • Monitor the plant carefully and adjust care based on its response

The Bigger Picture

Growing Kahili beggarticks isn’t just about adding another plant to your garden – it’s about participating in conservation. Every rare native plant successfully grown in cultivation represents hope for species preservation and ecological restoration.

If you can’t find Kahili beggarticks (which is likely, given its rarity), consider growing other native Hawaiian Bidens species or native plants that are more readily available. The important thing is supporting Hawaii’s native plant communities in whatever way you can.

Remember, when dealing with rare plants, patience and respect for their conservation status should guide every decision. These botanical treasures deserve our most thoughtful care and stewardship.

Kahili Beggarticks

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

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Bidens L. - beggarticks

Species

Bidens forbesii Sherff - coastal bluff beggarticks

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