North America Native Plant

Whiteheart

Botanical name: Oxypetalum cordifolium

USDA symbol: OXCO4

Life cycle: perennial

Habit: vine

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

Whiteheart: A Lesser-Known Native Treasure from the Caribbean If you’re passionate about native plants and have a connection to the Caribbean, you might be curious about whiteheart (Oxypetalum cordifolium). This perennial native has an intriguing story, though it’s one of those plants that seems to prefer keeping a low profile ...

Whiteheart: A Lesser-Known Native Treasure from the Caribbean

If you’re passionate about native plants and have a connection to the Caribbean, you might be curious about whiteheart (Oxypetalum cordifolium). This perennial native has an intriguing story, though it’s one of those plants that seems to prefer keeping a low profile in the gardening world.

What is Whiteheart?

Whiteheart is a perennial forb – essentially a non-woody herbaceous plant that comes back year after year. Unlike shrubs or trees, this plant lacks significant woody tissue above ground, instead maintaining its perennating buds at or below the soil surface. Think of it as nature’s way of playing it safe, keeping the important bits protected while the visible parts do their thing above ground.

Where Does Whiteheart Call Home?

This native beauty is indigenous to Puerto Rico and the U.S. Virgin Islands, making it a true Caribbean local. Its natural range is quite limited, being found specifically in these tropical island environments where it has adapted to the unique climate and growing conditions.

The Challenge with Whiteheart

Here’s where things get interesting – and a bit frustrating for gardeners. While whiteheart is undoubtedly a legitimate native species, detailed information about its cultivation, specific growing requirements, and garden performance is surprisingly scarce. This isn’t uncommon with lesser-known native plants, especially those from specialized habitats like Caribbean islands.

What we do know is that as a member of its native ecosystem, whiteheart likely plays a role in supporting local wildlife, though specific pollinator relationships and wildlife benefits aren’t well-documented in available sources.

Should You Try Growing Whiteheart?

This is where plant enthusiasm meets practical reality. While supporting native plants is always admirable, the lack of readily available cultivation information for whiteheart presents some challenges:

  • Limited availability from nurseries or seed sources
  • Unclear growing requirements and care instructions
  • Unknown adaptability to garden conditions
  • Uncertain performance outside its native range

Alternative Approaches

If you’re drawn to Caribbean natives or plants with similar characteristics, consider researching other well-documented native species from the region. Many botanical gardens and native plant societies in Puerto Rico and the Virgin Islands may have more detailed information about whiteheart and similar species.

For gardeners outside the Caribbean interested in supporting native ecosystems, focusing on well-documented local native plants will likely yield better results and provide clearer guidance for successful cultivation.

The Bigger Picture

Whiteheart represents something important in the native plant world – the reality that not every native species has been thoroughly studied or brought into cultivation. This doesn’t make these plants less valuable; it simply means they remain part of the wild tapestry of their native ecosystems, quietly doing their part without fanfare or garden center displays.

Sometimes the most responsible approach to loving native plants is appreciating them in their natural habitats while focusing our gardening efforts on natives that are better understood and more readily available through ethical sources.

Whiteheart

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

Gentianales

Family

Asclepiadaceae Borkh. - Milkweed family

Genus

Oxypetalum R. Br. - oxypetalum

Species

Oxypetalum cordifolium (Vent.) Schltr. - whiteheart

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