North America Native Plant

Smooth Leechbush

Botanical name: Dendropemon purpureus

USDA symbol: DEPU5

Life cycle: perennial

Habit: shrub

Native status: Native to Puerto Rico  

Synonyms: Phthirusa purpurea (L.) Engl. (PHPU14)   

Smooth Leechbush: A Rare Caribbean Native Worth Knowing If you’re passionate about native Caribbean plants or have a tropical garden in Puerto Rico, you might be curious about smooth leechbush (Dendropemon purpureus). This lesser-known shrub is a true Puerto Rican native that deserves more attention from gardeners interested in preserving ...

Smooth Leechbush: A Rare Caribbean Native Worth Knowing

If you’re passionate about native Caribbean plants or have a tropical garden in Puerto Rico, you might be curious about smooth leechbush (Dendropemon purpureus). This lesser-known shrub is a true Puerto Rican native that deserves more attention from gardeners interested in preserving local flora.

What is Smooth Leechbush?

Smooth leechbush is a perennial shrub that typically grows as a multi-stemmed woody plant. Like most shrubs, it usually stays under 13-16 feet tall, with several stems emerging from or near ground level. You might also see this plant listed under its scientific synonym, Phthirusa purpurea, in older botanical references.

Where Does It Grow Naturally?

This charming shrub is native to Puerto Rico, making it a true island endemic. Its natural range appears to be limited to this Caribbean island, which makes it particularly special for local gardeners who want to support indigenous plant communities.

Should You Plant Smooth Leechbush?

As a Puerto Rico native, smooth leechbush is an excellent choice for local gardeners who want to:

  • Support native ecosystems and wildlife
  • Create authentic Caribbean landscapes
  • Grow plants that are naturally adapted to local conditions
  • Preserve rare indigenous species

However, there’s a catch – detailed growing information for this species is quite limited. This suggests it’s not commonly cultivated, which isn’t unusual for many native Caribbean plants that haven’t made their way into mainstream horticulture yet.

Growing Conditions and Care

While specific cultivation details are scarce, we can make some educated guesses based on its native habitat:

  • Climate: Thrives in tropical conditions (likely USDA zones 10-11)
  • Origin: Being native to Puerto Rico, it’s adapted to warm, humid conditions year-round
  • Growth habit: Expect a shrubby form with multiple stems

The Challenge (and Opportunity)

Here’s the honest truth: smooth leechbush isn’t your typical garden center find. Limited horticultural information suggests this plant hasn’t been widely studied or cultivated. This presents both a challenge and an exciting opportunity for adventurous gardeners.

If you’re interested in growing this native Puerto Rican species, you might need to:

  • Connect with local native plant societies or botanical gardens
  • Source plants or seeds from reputable native plant specialists
  • Be prepared to experiment with growing conditions
  • Document your experiences to help other gardeners

Why It Matters

Even though we don’t have all the growing details figured out, smooth leechbush represents something important: the incredible diversity of Puerto Rico’s native flora. By showing interest in plants like this, we help preserve botanical heritage and potentially discover new garden-worthy species.

Plus, there’s something wonderfully rewarding about growing a plant that few others are cultivating – you become part of its conservation story!

The Bottom Line

Smooth leechbush might not be the easiest native plant to start with, but it’s definitely worth knowing about. If you’re in Puerto Rico and passionate about native plants, consider this species for your someday I’d like to try list. Who knows? You might become one of the first gardeners to really figure out how to successfully cultivate this intriguing Caribbean native.

Sometimes the most rewarding garden adventures begin with the plants that haven’t been fully explored yet!

Smooth Leechbush

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Santalales

Family

Loranthaceae Juss. - Showy Mistletoe family

Genus

Dendropemon (Blume) Schult. & Schult. f. - leechbush

Species

Dendropemon purpureus (L.) Krug & Urb. - smooth leechbush

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