North America Native Plant

Waihoi Beggarticks

Botanical name: Bidens campylotheca waihoiensis

USDA symbol: BICAW

Life cycle: perennial

Habit: subshrub

Native status: Native to Hawaii  

Waihoi Beggarticks: A Rare Hawaiian Treasure Worth Protecting Meet one of Hawaii’s most elusive native plants: the Waihoi beggarticks (Bidens campylotheca waihoiensis). This little-known perennial shrub represents the incredible botanical diversity that makes the Hawaiian Islands so special—and why conservation efforts are more important than ever. What Makes Waihoi Beggarticks ...

Rare plant alert!

Region: United States

Status: S2T1: 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) ⚘ Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Endangered: In danger of extinction throughout all or a significant portion of its range. ⚘

Region: United States

Waihoi Beggarticks: A Rare Hawaiian Treasure Worth Protecting

Meet one of Hawaii’s most elusive native plants: the Waihoi beggarticks (Bidens campylotheca waihoiensis). This little-known perennial shrub represents the incredible botanical diversity that makes the Hawaiian Islands so special—and why conservation efforts are more important than ever.

What Makes Waihoi Beggarticks Special?

The Waihoi beggarticks is a compact, low-growing shrub that stays modest in size, typically reaching under 1.5 feet tall and never exceeding 3 feet at maturity. As a perennial, it’s built to last, which makes its current precarious situation all the more concerning for Hawaii’s native ecosystem.

Where You’ll Find This Rare Beauty

This species is endemic to Hawaii, meaning it exists nowhere else on Earth. Its distribution is limited exclusively to the Hawaiian Islands, making it a true island treasure.

A Plant in Peril: Understanding Its Conservation Status

Important Conservation Alert: The Waihoi beggarticks is currently listed as Endangered in the United States, with a Global Conservation Status of S2T1. This means the species faces a very high risk of extinction, and every individual plant is precious for the survival of the species.

Should You Grow Waihoi Beggarticks?

Here’s where things get complicated. While supporting native Hawaiian plants is always admirable, the endangered status of Waihoi beggarticks means this isn’t a plant you can simply pick up at your local nursery—nor should you.

If you’re interested in growing this species, you must ensure:

  • Any plant material is obtained through legitimate conservation programs
  • Seeds or plants come from authorized botanical institutions or conservation organizations
  • You’re participating in legitimate conservation efforts rather than potentially harming wild populations
  • You understand the responsibility that comes with growing an endangered species

Supporting Hawaiian Native Plant Conservation

Instead of seeking out this endangered species for your garden, consider these ways to support Hawaiian native plant conservation:

  • Volunteer with local Hawaiian native plant societies and conservation organizations
  • Choose other native Hawaiian plants that are more readily available and less threatened
  • Support habitat restoration projects that protect endangered species like the Waihoi beggarticks
  • Donate to organizations working to preserve Hawaii’s unique endemic flora

Growing Conditions and Care

Due to the species’ endangered status and extremely limited availability, specific growing information for home gardeners is not widely documented. Any cultivation attempts should only be undertaken as part of legitimate conservation efforts with proper expertise and authorization.

The Bigger Picture

The story of Waihoi beggarticks serves as a reminder of how fragile our native ecosystems can be. Hawaii has lost many of its endemic species to habitat destruction, invasive species, and climate change. By learning about species like this one, we become better stewards of the irreplaceable natural heritage that surrounds us.

While you may not be able to add Waihoi beggarticks to your garden, you can still play a vital role in protecting Hawaii’s botanical treasures for future generations. Sometimes the best way to love a plant is to help preserve its wild habitat rather than bringing it into cultivation.

Waihoi 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 campylotheca Sch. Bip. - viper beggarticks

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