North America Native Plant

Schwaneck’s Logwood

Botanical name: Xylosma schwaneckeana

USDA symbol: XYSC3

Life cycle: perennial

Habit: shrub

Native status: Native to Puerto Rico  

Synonyms: Myroxylon schwaneckeanum Krug & Urb. (MYSC2)   

Schwaneck’s Logwood: A Critically Rare Puerto Rican Native If you’re searching for information about Schwaneck’s logwood (Xylosma schwaneckeana), you’ve stumbled upon one of Puerto Rico’s most elusive botanical treasures. This isn’t your typical garden center find – in fact, it’s so rare that most gardeners will never encounter it in ...

Rare plant alert!

Region: Conservation status by state

Status: S1: Status is uncertain but is somewhere between the following rankings: Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘

Schwaneck’s Logwood: A Critically Rare Puerto Rican Native

If you’re searching for information about Schwaneck’s logwood (Xylosma schwaneckeana), you’ve stumbled upon one of Puerto Rico’s most elusive botanical treasures. This isn’t your typical garden center find – in fact, it’s so rare that most gardeners will never encounter it in their lifetime.

What Makes This Plant So Special?

Schwaneck’s logwood is a perennial shrub that’s exclusively native to Puerto Rico. Also known scientifically as Xylosma schwaneckeana, this woody plant typically grows as a multi-stemmed shrub reaching heights of less than 13 to 16 feet under normal conditions. Like other shrubs, it develops several stems from near ground level, creating a bushy growth pattern.

What truly sets this plant apart isn’t just its Puerto Rican heritage – it’s its critically imperiled conservation status. With a Global Conservation Status of S1, Schwaneck’s logwood is hanging by a thread in the wild, with typically five or fewer known locations and fewer than 1,000 individual plants remaining in existence.

Where Does It Grow?

This rare shrub is found exclusively in Puerto Rico, making it a true island endemic. Its limited geographic distribution contributes significantly to its vulnerable status.

Should You Plant Schwaneck’s Logwood?

Here’s where things get serious, fellow plant enthusiasts. While the idea of growing such a rare native might seem appealing, this isn’t a plant for typical home gardeners. With its critically imperiled status, any cultivation should only be attempted through:

  • Certified conservation programs
  • Botanical institutions with proper permits
  • Licensed native plant nurseries working on species recovery
  • Government-approved habitat restoration projects

If you’re passionate about supporting Puerto Rican native plants, consider focusing on other native species that aren’t facing extinction. Your local native plant society or botanical garden can recommend alternatives that will give you that tropical native feel without potentially harming wild populations.

Growing Conditions and Habitat

Based on its wetland status as Facultative in the Caribbean region, Schwaneck’s logwood can tolerate both wetland and non-wetland conditions. This adaptability suggests it might be somewhat flexible in its moisture requirements, though specific growing conditions remain largely undocumented due to its rarity.

As a perennial shrub native to Puerto Rico’s tropical climate, it would presumably prefer warm, humid conditions year-round. However, without extensive cultivation records, specific care requirements remain a mystery.

The Conservation Connection

If you’re truly interested in this species, consider supporting conservation efforts instead of trying to grow it. Puerto Rico’s unique flora faces numerous threats, from habitat loss to climate change. Organizations working to protect the island’s native plants can use support – whether through donations, volunteer work, or spreading awareness about the importance of preserving these botanical treasures.

A Final Thought

Sometimes the most beautiful thing we can do as gardeners is admire from afar and protect what remains. Schwaneck’s logwood represents the fragility of island ecosystems and reminds us that not every plant is meant for our gardens – some are meant to inspire our conservation efforts instead.

If you’re gardening in Puerto Rico or similar tropical climates, reach out to local native plant groups for recommendations on abundant native species that can bring the beauty of Caribbean flora to your landscape without putting rare species at risk.

Schwaneck’s Logwood

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Violales

Family

Flacourtiaceae Rich. ex DC. - Flacourtia family

Genus

Xylosma G. Forst. - xylosma

Species

Xylosma schwaneckeana (Krug & Urb.) Urb. - Schwaneck's logwood

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