North America Native Plant

Kalealaha Beggarticks

Botanical name: Bidens micrantha kalealaha

USDA symbol: BIMIK2

Life cycle: perennial

Habit: subshrub

Native status: Native to Hawaii  

Synonyms: Bidens distans Sherff (BIDI3)  âš˜  Bidens micrantha Gaudich. var. rudimentifera Sherff (BIMIR)   

Kalealaha Beggarticks: A Rare Hawaiian Native Worth Protecting Meet the Kalealaha beggarticks (Bidens micrantha kalealaha), a charming little Hawaiian native that’s as unique as its melodious name suggests. This petite perennial shrub might be small in stature, but it plays a big role in Hawaii’s native ecosystem—and unfortunately, it’s one ...

Rare plant alert!

Region: United States

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 ⚘ Endangered: In danger of extinction throughout all or a significant portion of its range. ⚘

Region: United States

Kalealaha Beggarticks: A Rare Hawaiian Native Worth Protecting

Meet the Kalealaha beggarticks (Bidens micrantha kalealaha), a charming little Hawaiian native that’s as unique as its melodious name suggests. This petite perennial shrub might be small in stature, but it plays a big role in Hawaii’s native ecosystem—and unfortunately, it’s one of the islands’ most endangered plants.

What Makes Kalealaha Beggarticks Special?

This delightful native Hawaiian plant is a compact, low-growing shrub that typically stays under 1.5 feet tall, though it can occasionally reach up to 3 feet at maturity. Don’t let its modest size fool you—this little powerhouse produces cheerful yellow, daisy-like flowers that add a bright splash of color to any native garden.

Kalealaha beggarticks is endemic to the Hawaiian Islands, meaning you won’t find it growing naturally anywhere else on Earth. It’s perfectly adapted to Hawaii’s unique volcanic soils and climate, making it a true treasure of the islands’ botanical heritage.

Where Does It Grow?

This rare native is found exclusively in Hawaii, where it naturally occurs on volcanic slopes and in dry forest areas. Its distribution is limited to specific locations within the Hawaiian Islands, which contributes to its endangered status.

A Word of Caution: This Plant is Endangered

Important: Kalealaha beggarticks is classified as Endangered in the United States, with a Global Conservation Status of S3T1. This means the species is at serious risk of extinction. If you’re interested in growing this remarkable plant, it’s crucial to obtain it only through responsible sources such as:

  • Native plant societies
  • Botanical gardens with conservation programs
  • Licensed native plant nurseries
  • Plant rescue and restoration organizations

Never collect this plant from the wild, as doing so could further threaten already vulnerable populations.

Growing Kalealaha Beggarticks

If you’re fortunate enough to obtain this plant through proper channels, here’s how to help it thrive:

Ideal Growing Conditions

  • Climate: USDA hardiness zones 10-12 (tropical and subtropical)
  • Sunlight: Full sun to partial shade
  • Soil: Well-draining volcanic or sandy soil
  • Water: Drought tolerant once established, but benefits from occasional watering

Planting and Care Tips

  • Ensure excellent drainage—this plant doesn’t like wet feet
  • Plant in spring after any danger of cool weather has passed
  • Water regularly during establishment, then reduce frequency
  • Protect from strong winds, which can damage the delicate branches
  • No fertilizer needed if planted in appropriate soil

Garden Design and Landscape Role

Kalealaha beggarticks works beautifully in several garden settings:

  • Native Hawaiian gardens: Perfect for authentic island landscapes
  • Xerophytic gardens: Excellent choice for water-wise gardening
  • Conservation gardens: Ideal for habitat restoration projects
  • Ground cover: Great for covering slopes and preventing erosion

Benefits to Wildlife and Pollinators

This native plant supports Hawaii’s unique ecosystem by providing nectar for native Hawaiian insects and occasional butterfly visitors. Its flowers are particularly valuable because they bloom when other native nectar sources might be scarce.

Should You Plant Kalealaha Beggarticks?

The answer depends on your situation and commitment to conservation. If you:

  • Live in Hawaii or a similar climate (zones 10-12)
  • Can obtain plants through responsible, legal sources
  • Are committed to proper care and conservation
  • Want to support native Hawaiian plant preservation

Then yes, this plant could be a wonderful addition to your garden and a meaningful contribution to conservation efforts.

However, if you’re looking for easier-to-find alternatives, consider other native Hawaiian Bidens species or consult with local native plant societies for similar plants that aren’t as critically endangered.

The Bottom Line

Kalealaha beggarticks is more than just a pretty plant—it’s a living piece of Hawaiian natural history that needs our protection. While growing it requires extra responsibility and care, those who can do so properly are helping preserve a unique species for future generations. Just remember: always source responsibly, and never take plants from the wild. Every garden-grown Kalealaha beggarticks is a small victory for conservation!

Kalealaha 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 micrantha Gaudich. - grassland beggarticks

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