Non-native Plants

Manystem Wildrye

Leymus multicaulis

USDA symbol: LEMU11

perennial grass

Lower 48 states: non-native, naturalized

If you’ve stumbled across the name manystem wildrye (Leymus multicaulis) in your plant research, you’re probably wondering what exactly this grass is and whether it belongs in your garden. Here’s the straight scoop: this is one of those plants that exists more in botanical databases than in actual gardens, and ...

Manystem Wildrye: A Little-Known Grass with Limited Garden Potential

If you’ve stumbled across the name manystem wildrye (Leymus multicaulis) in your plant research, you’re probably wondering what exactly this grass is and whether it belongs in your garden. Here’s the straight scoop: this is one of those plants that exists more in botanical databases than in actual gardens, and there’s a good reason for that.

What Exactly is Manystem Wildrye?

Manystem wildrye is a perennial grass that falls into that broad category of graminoid plants – basically, anything grass-like including true grasses, sedges, and rushes. This particular species goes by the scientific name Leymus multicaulis, though you might occasionally see it listed under its older names like Elymus multicaulis or Elymus aralensis.

Here’s where things get interesting (or frustrating, depending on your perspective): this grass is somewhat of a botanical mystery. While it’s documented as growing in Wyoming, there’s surprisingly little information available about its characteristics, growing habits, or garden potential.

Where Does It Come From?

Manystem wildrye is not native to North America. Based on its synonyms and limited botanical records, it appears to have origins in Central Asia. In the United States, it’s been documented in Wyoming, where it has established itself and reproduces without human intervention.

  • Species observed
  • No observations

Should You Plant Manystem Wildrye?

This is where I’m going to level with you: probably not. Here’s why:

  • Limited availability: You’d be hard-pressed to find this grass at nurseries or even specialty native plant sales
  • Unknown garden performance: There’s virtually no information about how it performs in cultivation, its mature size, or its care requirements
  • Uncertain ecological impact: While not currently listed as invasive, its non-native status and ability to self-reproduce raises questions
  • Better alternatives exist: There are plenty of well-documented native grasses that offer known benefits

Native Alternatives to Consider Instead

Rather than taking a gamble on this mysterious grass, consider these well-documented native alternatives that offer proven garden performance:

  • Blue grama (Bouteloua gracilis): A beautiful native bunch grass perfect for xeriscaping
  • Buffalo grass (Poaceae dactyloides): Excellent for low-water lawns in appropriate regions
  • Little bluestem (Schizachyrium scoparium): Stunning fall color and four-season interest
  • Prairie dropseed (Sporobolus heterolepis): Fragrant native grass with graceful form

The Bottom Line

Sometimes in gardening, the most honest advice is to skip a particular plant entirely. Manystem wildrye falls into this category – not because it’s necessarily bad, but because there’s simply too much we don’t know about it. With so many fantastic native grass options available that offer documented benefits for wildlife, pollinators, and garden aesthetics, there’s really no compelling reason to gamble on this botanical enigma.

Stick with the proven performers, and your garden (and local ecosystem) will thank you for it. Save your experimental energy for plants with a better track record and clearer benefits!

Leymus multicaulis is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Leymus multicaulis is also known as:

Elymus aralensis | USDA symbol: ELAR11
Elymus multicaulis & | USDA symbol: ELMU5

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Monocot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Liliopsida - Monocotyledons
Subclass: Commelinidae
Order: Cyperales
Family: Poaceae Barnhart - Grass family
Genus: Leymus Hochst. - wildrye

Species: Leymus multicaulis (Kar. & Kir.) Tzvelev - manystem wildrye

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