North America Native Plant

Mucilage Manjack

Botanical name: Cordia sulcata

USDA symbol: COSU3

Life cycle: perennial

Habit: shrub

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

Mucilage Manjack: A Caribbean Native Worth Discovering If you’re looking to add some Caribbean flair to your native plant garden, you might want to get acquainted with mucilage manjack (Cordia sulcata). This perennial shrub is a true island native, calling Puerto Rico and the U.S. Virgin Islands home. While it ...

Mucilage Manjack: A Caribbean Native Worth Discovering

If you’re looking to add some Caribbean flair to your native plant garden, you might want to get acquainted with mucilage manjack (Cordia sulcata). This perennial shrub is a true island native, calling Puerto Rico and the U.S. Virgin Islands home. While it might not be as well-known as some of its flashier tropical cousins, this unassuming plant has its own quiet charm and ecological value.

What Makes Mucilage Manjack Special?

Mucilage manjack is a multi-stemmed woody shrub that typically stays under 13-16 feet tall, making it a manageable size for most garden spaces. Like other shrubs, it develops several stems from the ground, creating a nice bushy appearance that can add structure and year-round interest to your landscape.

As a member of the Boraginaceae family (the same family that includes forget-me-nots and borage), mucilage manjack shares some family traits, though specific details about its flowers and overall appearance are not widely documented in horticultural literature.

Where Does It Grow?

This Caribbean native is found naturally in Puerto Rico and the U.S. Virgin Islands, where it has adapted to the unique growing conditions of these tropical islands. Its native range suggests it’s well-suited to warm, humid climates and can handle the challenges that come with island living.

Should You Plant Mucilage Manjack?

Here’s where things get a bit tricky. While mucilage manjack is definitely a legitimate native plant worth considering, detailed growing information is surprisingly scarce. This could be because:

  • It’s not commonly cultivated in the horticultural trade
  • It may be more of a conservation interest than a garden plant
  • Local knowledge in its native range may not have been widely documented

If you’re gardening in Puerto Rico or the U.S. Virgin Islands, this native shrub could be an excellent choice for supporting local ecosystems. Native plants are always the gold standard for supporting local wildlife, improving soil health, and creating sustainable landscapes that don’t require excessive water or fertilizer.

Growing Conditions and Care

While specific growing requirements for mucilage manjack aren’t well-documented, we can make some educated guesses based on its native habitat and plant family characteristics:

  • Likely prefers warm, tropical conditions year-round
  • Probably tolerates some drought once established, as many Caribbean natives do
  • May appreciate well-draining soil, as waterlogged conditions can be problematic for many shrubs
  • Could benefit from some protection from the strongest winds if grown in exposed locations

The Bottom Line

Mucilage manjack represents one of those interesting gaps in our horticultural knowledge. While it’s clearly a legitimate native plant with ecological value, the lack of detailed cultivation information makes it more of an adventure for experienced native plant enthusiasts rather than a beginner-friendly choice.

If you’re in its native range and interested in trying something truly local, you might want to reach out to local native plant societies, botanical gardens, or conservation organizations. They may have seeds, cuttings, or growing advice that hasn’t made it into mainstream gardening resources.

For gardeners outside of Puerto Rico and the U.S. Virgin Islands, you’ll want to focus on natives from your own region. Every area has its own wonderful selection of native shrubs that will be much better adapted to your local conditions and easier to grow successfully.

Sometimes the most interesting plants are the ones we know the least about – and mucilage manjack definitely falls into that category!

Mucilage Manjack

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

Lamiales

Family

Boraginaceae Juss. - Borage family

Genus

Cordia L. - cordia

Species

Cordia sulcata DC. - mucilage manjack

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