North America Native Plant

Chamissoa

Botanical name: Chamissoa

USDA symbol: CHAMI

Life cycle: annual

Habit: vine

Native status: Native to Puerto Rico âš˜ Native to the U.S. Virgin Islands  

Chamissoa: A Caribbean Native Worth Getting to Know If you’re gardening in the Caribbean or looking for something truly unique for your tropical landscape, you might want to get acquainted with chamissoa (Chamissoa). This lesser-known native gem hails from Puerto Rico and the U.S. Virgin Islands, bringing a bit of ...

Chamissoa: A Caribbean Native Worth Getting to Know

If you’re gardening in the Caribbean or looking for something truly unique for your tropical landscape, you might want to get acquainted with chamissoa (Chamissoa). This lesser-known native gem hails from Puerto Rico and the U.S. Virgin Islands, bringing a bit of authentic Caribbean charm to gardens lucky enough to host it.

What Exactly Is Chamissoa?

Chamissoa is what botanists call a forb – essentially a non-woody plant that dies back to the ground each year (or sticks around as a perennial, depending on conditions). Think of it as the herbaceous cousin in the plant world, without the thick, woody stems of shrubs and trees. It’s part of the amaranth family, which gives you a hint about its hardy, adaptable nature.

Where You’ll Find This Caribbean Native

This plant calls the Caribbean home, specifically Puerto Rico and the U.S. Virgin Islands. It’s perfectly adapted to the tropical and subtropical conditions of these beautiful islands, making it a fantastic choice for gardeners in similar climates.

Why Consider Chamissoa for Your Garden?

Here’s where things get a bit mysterious – chamissoa is one of those plants that hasn’t made it into every gardening book or website yet. But that’s not necessarily a bad thing! Sometimes the most rewarding plants are the ones that require a bit of detective work and experimentation.

As a native Caribbean species, chamissoa likely offers several benefits:

  • Naturally adapted to tropical and subtropical conditions
  • Potentially drought-tolerant once established
  • May provide food and habitat for local wildlife
  • Adds authentic regional character to native plant gardens

Growing Chamissoa: What We Know

Here’s where I have to be honest with you – detailed growing information for chamissoa is surprisingly scarce. This could mean a few things: it might be relatively uncommon in cultivation, it could be so easy to grow that no one bothers writing about it, or it might simply be understudied.

What we can reasonably assume based on its native habitat:

  • Prefers warm, tropical to subtropical conditions
  • Likely enjoys well-draining soil
  • Probably appreciates some humidity
  • May benefit from protection during cooler periods if grown outside its native range

Is Chamissoa Right for Your Garden?

Chamissoa might be perfect for you if:

  • You’re gardening in Puerto Rico, the U.S. Virgin Islands, or similar climates
  • You love experimenting with unusual native plants
  • You’re creating a Caribbean native plant garden
  • You enjoy being a plant pioneer and don’t mind some trial and error

However, you might want to look elsewhere if you need guaranteed results or detailed care instructions right away.

The Bottom Line on Chamissoa

Sometimes the most interesting plants are the ones shrouded in a bit of mystery. Chamissoa represents an opportunity to work with a true Caribbean native that hasn’t been over-studied or over-hybridized. If you’re in the right climate zone and love the idea of growing something genuinely local and unique, this could be your next gardening adventure.

Just remember – with lesser-known plants like chamissoa, patience and observation are your best tools. Start small, take notes, and enjoy the journey of getting to know a plant that many gardeners have never even heard of.

Chamissoa

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Caryophyllales

Family

Amaranthaceae Martinov - Amaranth family

Genus

Chamissoa Kunth - chamissoa

Species

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