Native Plants

Viper Beggarticks

Bidens campylotheca pentamera

USDA symbol: BICAP

perennial subshrub

Hawaii: native

Meet the viper beggarticks (Bidens campylotheca pentamera), one of Hawaii’s most endangered native flowering plants. This remarkable little shrub might not be on every gardener’s wishlist, but it deserves our attention and respect as a critically important piece of Hawaii’s unique botanical heritage. Viper beggarticks is a perennial shrub that ...

Viper Beggarticks may be listed as rare in your area.
Global Conservation Status

Status: S2T1 | Imperiled: Extremely rare. Typically 6 to 20 occurrences or 1,000 to 3,000 remaining individuals.

United States

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

Viper Beggarticks: A Rare Hawaiian Treasure Worth Protecting

Meet the viper beggarticks (Bidens campylotheca pentamera), one of Hawaii’s most endangered native flowering plants. This remarkable little shrub might not be on every gardener’s wishlist, but it deserves our attention and respect as a critically important piece of Hawaii’s unique botanical heritage.

What Makes Viper Beggarticks Special?

Viper beggarticks is a perennial shrub that stays refreshingly compact, typically growing as a low shrub under 1.5 feet tall and never exceeding 3 feet at maturity. This modest size makes it an intriguing option for small spaces, though its rarity means most gardeners will never encounter it.

You might also see this plant listed under its botanical synonyms: Bidens campylotheca Sch. Bip. var. pentamera Sherff or Bidens pentamera (Sherff) O. Deg. & Sherff. But whatever name it goes by, this little beauty is 100% Hawaiian.

Where Does It Call Home?

Viper beggarticks is exclusively native to Hawaii, making it a true island endemic. This means you won’t find it growing naturally anywhere else on Earth – talk about being location-specific! Its distribution within Hawaii is extremely limited.

  • Species observed
  • No observations

The Reality Check: Why This Isn’t Your Average Garden Plant

Here’s where we need to have an honest conversation. Viper beggarticks carries a Global Conservation Status of S2T1 and is listed as Endangered in the United States. This isn’t just rare – it’s hanging on by a thread in the wild.

What does this mean for gardeners? If you’re lucky enough to come across viper beggarticks, you should only consider planting it if you can guarantee the plant material was responsibly sourced through legitimate conservation programs or botanical institutions. Wild collection would be both illegal and harmful to the species’ survival.

Growing Conditions and Care

Unfortunately, specific growing requirements for viper beggarticks remain largely undocumented, which isn’t surprising given its endangered status. Most information about its cultivation needs has been lost or never recorded as the species became increasingly rare.

What we do know is that as a Hawaiian native, it evolved in tropical conditions and would likely require:

  • Warm temperatures year-round
  • Protection from harsh winds
  • Well-draining soil
  • Careful attention to watering needs

The Bigger Picture

Rather than focusing solely on how to grow viper beggarticks, perhaps we should consider what this plant represents. It’s a reminder of Hawaii’s incredible biodiversity and the urgent need to protect native species before they disappear forever.

If you’re passionate about Hawaiian native plants but can’t access viper beggarticks, consider supporting local conservation efforts or growing other native Hawaiian species that are more readily available through ethical sources.

Bottom Line

Viper beggarticks is a plant that deserves our respect and protection rather than casual cultivation. While it might make a fascinating addition to a specialized native Hawaiian garden, its endangered status means it belongs primarily in conservation programs and botanical preserves.

If you’re drawn to rare Hawaiian natives, connect with local botanical gardens, native plant societies, or conservation organizations. They can guide you toward responsible ways to appreciate and potentially grow Hawaiian endemic species while supporting conservation efforts.

Sometimes the most meaningful way to grow a plant is to help ensure it survives in its natural habitat for future generations to discover and admire.

Bidens campylotheca pentamera is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Bidens campylotheca pentamera is also known as:

Bidens campylotheca var. pentamera | USDA symbol: BICAP2
Bidens pentamera & | USDA symbol: BIPE

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
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

Subspecies: Bidens campylotheca Sch. Bip. ssp. pentamera (Sherff) Ganders & Nagata - 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