North America Non-native Plant

Pennisetum Divisum

Botanical name: Pennisetum divisum

USDA symbol: PEDI16

Habit: grass

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

Synonyms: Pennisetum dichotomum (Forssk.) Delile (PEDI15)   

Pennisetum divisum: A Mysterious Grass Worth Understanding If you’ve stumbled across the name Pennisetum divisum in your gardening research, you’re not alone in finding limited information about this elusive grass species. Sometimes in the world of native gardening, we encounter plants that are more botanical puzzles than garden staples, and ...

Pennisetum divisum: A Mysterious Grass Worth Understanding

If you’ve stumbled across the name Pennisetum divisum in your gardening research, you’re not alone in finding limited information about this elusive grass species. Sometimes in the world of native gardening, we encounter plants that are more botanical puzzles than garden staples, and Pennisetum divisum certainly falls into this category.

What is Pennisetum divisum?

Pennisetum divisum is a grass species belonging to the Poaceae family, the same family that includes familiar grasses like fountain grass and feather reed grass. This species is also known by the synonym Pennisetum dichotomum, which may be more recognizable to some botanists and plant enthusiasts.

As a member of the grass family, Pennisetum divisum shares characteristics with other graminoid plants – those grass-like species that include true grasses, sedges, rushes, and their relatives. However, unlike its more famous cousins in the Pennisetum genus, this particular species remains somewhat mysterious in terms of its specific characteristics and garden applications.

The Challenge of Limited Information

Here’s where things get a bit tricky for us gardening enthusiasts. Pennisetum divisum appears to have very limited documentation in horticultural literature, and specific information about its native range, growing conditions, and garden suitability is scarce. This lack of readily available information suggests that it may be:

  • A species with very limited distribution
  • Primarily of botanical rather than horticultural interest
  • Possibly confused with other Pennisetum species in cultivation
  • Not commonly available in the nursery trade

Geographic Distribution and Native Status

While specific distribution data for Pennisetum divisum is not readily available, its synonym Pennisetum dichotomum provides some clues that it may originate from arid regions of Africa or the Middle East, based on the naming authority and botanical history. However, without concrete data, it’s impossible to make definitive statements about its native range or status in any particular region.

Should You Grow Pennisetum divisum?

Given the limited information available about this species, it’s difficult to recommend Pennisetum divisum for most home gardeners. The lack of cultivation information, unclear availability, and uncertain growing requirements make it a challenging choice for typical landscape applications.

Better Alternatives for Your Garden

Instead of pursuing this elusive species, consider these well-documented native grass alternatives that offer reliable performance and clear growing guidelines:

  • Little Bluestem (Schizachyrium scoparium) – A beautiful native bunch grass with excellent fall color
  • Buffalo Grass (Poëa dactyloides) – Perfect for low-water landscapes in appropriate climates
  • Native Fountain Grass species – Look for regionally appropriate Pennisetum species that are well-documented
  • Switchgrass (Panicum virgatum) – Versatile and wildlife-friendly

The Takeaway for Native Gardeners

While Pennisetum divisum remains an intriguing botanical specimen, the responsible approach for most gardeners is to focus on well-documented native grasses with established cultivation information. These alternatives not only offer greater chances of success but also provide clear benefits to local wildlife and ecosystems.

If you’re determined to explore unusual grass species, work with reputable native plant societies, botanical gardens, or specialized nurseries that can provide accurate identification and growing information. Remember, the goal of native gardening is to support local ecosystems with plants that we understand well enough to grow successfully and sustainably.

Sometimes the most exciting discoveries in gardening come not from chasing rare or mysterious species, but from truly understanding and appreciating the well-documented native plants that are perfectly suited to our local conditions and wildlife needs.

Pennisetum Divisum

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

Pennisetum Rich. ex Pers. - fountaingrass

Species

Pennisetum divisum (Forssk. ex J.F. Gmel.) Henrard

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