North America Native Plant

Hammockherb

Botanical name: Hasteola robertiorum

USDA symbol: HARO

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Hammockherb: Florida’s Critically Rare Native Treasure Meet hammockherb (Hasteola robertiorum), one of Florida’s most elusive native plants. If you’ve never heard of this perennial forb, you’re not alone – it’s so rare that botanists consider it critically imperiled. Before you start planning where to plant it in your garden, there’s ...

Rare plant alert!

Region: Conservation status by state

Status: S1: Status is uncertain but is somewhere between the following rankings: 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) ⚘

Hammockherb: Florida’s Critically Rare Native Treasure

Meet hammockherb (Hasteola robertiorum), one of Florida’s most elusive native plants. If you’ve never heard of this perennial forb, you’re not alone – it’s so rare that botanists consider it critically imperiled. Before you start planning where to plant it in your garden, there’s something important you need to know about this mysterious Florida native.

What Makes Hammockherb Special

Hammockherb is a native perennial forb, which means it’s an herbaceous plant without woody stems that returns year after year. As its common name suggests, this plant is closely associated with Florida’s unique hammock ecosystems – those magical islands of hardwood trees that dot the state’s landscape.

What truly sets hammockherb apart isn’t just its rarity, but its incredible specificity to Florida’s environment. This plant has evolved to thrive in conditions found nowhere else, making it a true Florida original.

Where Does Hammockherb Grow?

Hammockherb is endemic to Florida, meaning it grows naturally nowhere else on Earth. Within the Sunshine State, it’s found in very specific locations that provide the exact conditions this finicky plant requires.

The Rarity Reality Check

Here’s where things get serious: hammockherb has a Global Conservation Status of S1, which means it’s critically imperiled. In scientific terms, this means there are typically five or fewer known populations, with fewer than 1,000 individual plants remaining in the wild. To put this in perspective, there are more giant pandas in the world than there are hammockherb plants!

This extreme rarity means that hammockherb faces a very real risk of extinction. Every remaining plant is precious, and every habitat where it grows needs protection.

Should You Grow Hammockherb in Your Garden?

While the idea of growing such a rare native plant might seem appealing, the reality is complicated. Due to its critically imperiled status, hammockherb should only be grown using responsibly sourced material – meaning plants or seeds obtained through legitimate conservation programs or botanical institutions.

If you’re considering growing hammockherb:

  • Only source material from conservation organizations or certified native plant nurseries
  • Never collect plants or seeds from wild populations
  • Consider supporting hammockherb conservation efforts instead
  • Contact local botanical gardens or native plant societies for guidance

Growing Conditions and Care

Given hammockherb’s extreme rarity, detailed growing information is limited. What we do know is that this plant has evolved to survive in Florida’s unique hammock environments, which suggests it likely prefers:

  • Partial shade conditions similar to forest understory
  • Well-draining but moisture-retentive soil
  • Protection from harsh direct sunlight
  • Florida’s warm, humid climate conditions

Because of its specific habitat requirements and endangered status, hammockherb is not recommended for beginning gardeners or those without experience growing rare native plants.

Alternative Native Plants to Consider

Instead of trying to grow hammockherb, consider these more readily available Florida native alternatives that can provide similar ecological benefits:

  • Wild coffee (Psychotria nervosa) – another hammock understory native
  • Coontie (Zamia integrifolia) – Florida’s only native cycad
  • Firebush (Hamelia patens) – attracts butterflies and hummingbirds
  • Simpson’s stopper (Myrcianthes fragrans) – fragrant native shrub

Supporting Hammockherb Conservation

The best way to help hammockherb isn’t necessarily by growing it, but by supporting its conservation. Consider:

  • Donating to organizations working to protect Florida’s hammock habitats
  • Participating in habitat restoration projects
  • Choosing other native plants for your garden to support local ecosystems
  • Spreading awareness about Florida’s rare native plants

The Bottom Line

Hammockherb represents both the incredible diversity of Florida’s native flora and the urgent need for plant conservation. While this critically rare species isn’t practical for most home gardens, learning about it reminds us why protecting natural habitats and choosing native plants matters.

Every native plant we grow – whether common or rare – plays a role in supporting Florida’s unique ecosystems. So while you might not be able to grow hammockherb in your backyard, you can still make a difference by choosing other Florida natives and supporting conservation efforts for rare species like this remarkable little forb.

Hammockherb

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

Hasteola Raf. - false Indian plantain

Species

Hasteola robertiorum L.C. Anderson - hammockherb

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