North America Native Plant

South American Bonnet Orchid

Botanical name: Pleurothallis obovata

USDA symbol: PLOB4

Life cycle: perennial

Habit: forb

Native status: Native to Puerto Rico  

South American Bonnet Orchid: A Tiny Tropical Treasure for Orchid Enthusiasts If you’re looking to add a touch of Caribbean charm to your orchid collection, meet the South American bonnet orchid (Pleurothallis obovata). Despite its common name suggesting a broader South American range, this delicate little orchid is actually a ...

South American Bonnet Orchid: A Tiny Tropical Treasure for Orchid Enthusiasts

If you’re looking to add a touch of Caribbean charm to your orchid collection, meet the South American bonnet orchid (Pleurothallis obovata). Despite its common name suggesting a broader South American range, this delicate little orchid is actually a Puerto Rican native that brings tropical elegance to any specialized growing setup.

What Makes This Orchid Special?

The South American bonnet orchid is what orchid lovers call a miniature species – and we mean truly miniature. This perennial epiphyte produces tiny, translucent flowers that may be small in stature but are big on charm when viewed up close. As a forb (a non-woody vascular plant), it maintains a compact, delicate appearance that makes it perfect for collectors who appreciate subtlety over showiness.

Where Does It Come From?

This orchid is native exclusively to Puerto Rico, where it grows naturally as an epiphyte in the island’s tropical forests. While its common name might be a bit misleading about its geographic origins, its Puerto Rican heritage makes it a true Caribbean gem.

Is This Orchid Right for Your Garden?

Let’s be honest – the South American bonnet orchid isn’t for every gardener. This little beauty is definitely what you’d call a specialist plant. Here’s who might fall in love with it:

  • Orchid collectors who enjoy rare and unusual species
  • Terrarium enthusiasts looking for authentic tropical plants
  • Greenhouse gardeners in cooler climates
  • Anyone fascinated by Puerto Rican native flora

However, if you’re looking for a low-maintenance outdoor perennial or a showy flowering plant for your landscape, this probably isn’t your best bet.

Growing Conditions and Care

Since this orchid is only hardy in USDA zones 10-11, most gardeners will need to grow it indoors or in a greenhouse. Here’s what your South American bonnet orchid needs to thrive:

Light and Location

Provide bright, filtered light – think dappled sunlight through a forest canopy. A north or east-facing window works well, or use grow lights if natural light is limited.

Humidity and Air Circulation

High humidity is non-negotiable – aim for 60-80%. Use humidity trays, group with other plants, or consider a small humidifier. Good air circulation prevents fungal issues, so a gentle fan nearby can work wonders.

Growing Medium

As an epiphyte, this orchid doesn’t grow in regular potting soil. Instead, use:

  • Orchid bark mix with good drainage
  • Mounting on cork bark or tree fern fiber
  • Sphagnum moss for smaller specimens

Watering Wisdom

Water when the growing medium is nearly dry but not completely dried out. In its native Puerto Rican habitat, it would experience regular moisture from humidity and occasional rains, but never waterlogged conditions.

The Bottom Line

The South American bonnet orchid is a charming addition for dedicated orchid growers who appreciate subtle beauty and don’t mind providing specialized care. While it won’t give you big, flashy blooms for your outdoor garden beds, it offers the satisfaction of growing a true Puerto Rican native species and the joy of discovering its tiny, intricate flowers.

If you’re new to orchid growing or prefer low-maintenance plants, you might want to start with hardier orchid species first. But for those ready to embrace the challenge, this little bonnet orchid can be a rewarding addition to any serious orchid collection.

South American Bonnet Orchid

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Liliidae

Order

Orchidales

Family

Orchidaceae Juss. - Orchid family

Genus

Pleurothallis R. Br. - bonnet orchid

Species

Pleurothallis obovata (Lindl.) Lindl. - South American bonnet orchid

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