North America Non-native Plant

Philippine Watercrown Grass

Botanical name: Paspalidium philippianum

USDA symbol: PAPH2

Life cycle: perennial

Habit: grass

Native status: Not native but doesn't reproduce and persist in the wild

Synonyms: Paspalidium macrospermum Roseng. (PAMA13)   

Philippine Watercrown Grass: A Mystery Plant Worth Investigating Ever stumbled across a plant name that sounds intriguing but leaves you scratching your head when you try to learn more about it? Meet Philippine watercrown grass (Paspalidium philippianum), a perennial grass that’s about as mysterious as plants get in the gardening ...

Philippine Watercrown Grass: A Mystery Plant Worth Investigating

Ever stumbled across a plant name that sounds intriguing but leaves you scratching your head when you try to learn more about it? Meet Philippine watercrown grass (Paspalidium philippianum), a perennial grass that’s about as mysterious as plants get in the gardening world.

What We Know (And Don’t Know)

Here’s the honest truth: Philippine watercrown grass is one of those plants that botanists know exists, but gardeners rarely encounter. It belongs to the grass family (Poaceae) and is classified as a perennial, meaning it should theoretically come back year after year. The scientific name hints at a connection to the Philippines, suggesting this grass likely calls Southeast Asia home.

But here’s where things get fuzzy. Despite its evocative common name, there’s surprisingly little information available about this grass’s appearance, growing habits, or garden potential. It’s also known by the synonym Paspalidium macrospermum, but that doesn’t help us much either in terms of practical growing advice.

Geographic Distribution

While we can make educated guesses based on the name philippianum, the exact native range of this grass remains unclear in available horticultural literature. This uncertainty makes it challenging to recommend appropriate growing conditions or determine its suitability for different climate zones.

The Challenge of Obscure Native Plants

Philippine watercrown grass represents a common dilemma in native plant gardening: what do you do when you’re interested in a species that lacks readily available growing information? This situation highlights why many gardeners stick with well-documented native plants that have proven track records in cultivation.

Should You Try Growing It?

Given the lack of available information about Philippine watercrown grass, it’s difficult to recommend it for most home gardens. We don’t know:

  • Its mature size or growth habit
  • Preferred soil conditions
  • Water requirements
  • USDA hardiness zones
  • Potential invasive tendencies
  • Wildlife or pollinator benefits

Without this crucial information, attempting to grow this grass would be a shot in the dark that might not end well for either you or your garden ecosystem.

Better-Documented Native Grass Alternatives

If you’re drawn to native grasses (and who isn’t?), consider these well-researched alternatives that offer reliable performance and documented benefits:

  • Little bluestem (Schizachyrium scoparium) – gorgeous fall color
  • Buffalo grass (Poaceae family) – drought-tolerant lawn alternative
  • Purple lovegrass (Eragrostis spectabilis) – stunning purple seed heads
  • Native sedges (Carex species) – versatile for various conditions

The Bottom Line

While Philippine watercrown grass might sound exotic and appealing, the lack of available cultivation information makes it impractical for most gardeners. Sometimes the most responsible choice is to stick with native plants that have been thoroughly studied and proven successful in home landscapes. Your garden (and your sanity) will thank you for choosing plants with clear growing guides and predictable behavior.

If you’re absolutely determined to explore obscure native species, consider connecting with botanical gardens, native plant societies, or university extension programs that might have more specialized knowledge about unusual plants like Paspalidium philippianum.

Philippine Watercrown Grass

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Paspalidium Stapf - watercrown grass

Species

Paspalidium philippianum Parodi [excluded] - Philippine watercrown grass

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