North America Non-native Plant

Aira Caryophyllea Var. Multiculmis

Botanical name: Aira caryophyllea var. multiculmis

USDA symbol: AICAM2

Life cycle: annual

Habit: grass

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

Synonyms: Aira caryophyllea L. ssp. multiculmis (Dumort.) Bonnier & Layens (AICAM)  ⚘  Aira multiculmis Dumort. (AIMU)   

Aira caryophyllea var. multiculmis: A Little-Known Grass Variety Worth Understanding In the vast world of grasses, some species fly completely under the radar, and Aira caryophyllea var. multiculmis is definitely one of those quiet characters. This particular variety of grass might not be making headlines in gardening magazines, but it’s ...

Aira caryophyllea var. multiculmis: A Little-Known Grass Variety Worth Understanding

In the vast world of grasses, some species fly completely under the radar, and Aira caryophyllea var. multiculmis is definitely one of those quiet characters. This particular variety of grass might not be making headlines in gardening magazines, but it’s part of an interesting botanical story that’s worth exploring.

What Exactly Is This Grass?

Aira caryophyllea var. multiculmis belongs to the Poaceae family (that’s the grass family for those keeping track at home). It’s an annual grass, meaning it completes its entire life cycle in just one growing season. Think of it as nature’s way of living fast and leaving a beautiful legacy of seeds for next year.

This particular variety has a few aliases in the botanical world. You might also see it referred to as Aira caryophyllea L. ssp. multiculmis or Aira multiculmis, depending on which botanical reference you’re consulting. Like many plants, it’s gone through some naming changes as botanists have refined their understanding of plant relationships.

The Mystery of Limited Information

Here’s where things get interesting (and a bit frustrating for plant enthusiasts): specific information about this variety is surprisingly scarce. While its parent species, Aira caryophyllea, is better documented, the var. multiculmis seems to be one of those botanical gems that hasn’t received much attention in popular gardening circles.

What we do know is that this is a graminoid – a fancy term that includes grasses, sedges, rushes, and other grass-like plants. These plants are the unsung heroes of many ecosystems, providing structure, erosion control, and habitat for countless small creatures.

Geographic Distribution and Natural Range

The geographic distribution of this specific variety remains unclear in available literature. Many Aira species have European origins, but without specific documentation for var. multiculmis, it’s difficult to pinpoint exactly where you might encounter this grass in the wild.

Should You Grow It?

This is where we hit another interesting puzzle. With limited cultivation information available, growing Aira caryophyllea var. multiculmis would be quite the botanical adventure. The lack of readily available information about its growing requirements, native status, and garden performance makes it challenging to recommend for typical home landscapes.

If you’re someone who loves botanical mysteries and has experience with unusual grasses, this might intrigue you. However, for most gardeners, there are many well-documented native grasses that would be better choices for adding graminoid interest to your landscape.

Alternative Native Grasses to Consider

Instead of wrestling with the unknowns of this particular variety, consider exploring native grasses in your region. Here are some generally excellent options:

  • Little bluestem for prairie-style gardens
  • Buffalo grass for low-maintenance lawns in appropriate climates
  • Native fescues for cooler regions
  • Bunch grasses appropriate to your local ecosystem

The Takeaway

Aira caryophyllea var. multiculmis represents one of those fascinating botanical footnotes – a plant that exists in the scientific literature but remains largely mysterious in practical gardening terms. While it’s always exciting to discover unusual species, sometimes the most rewarding approach is to focus on well-documented native plants that we know will thrive and support local ecosystems.

If you do encounter this grass in the wild or in specialized botanical collections, take a moment to appreciate it as part of the incredible diversity of the grass family. Just remember that for your home landscape, you’ll probably have better luck (and more reliable information) with other grass species that have been more thoroughly studied and cultivated.

Aira Caryophyllea Var. Multiculmis

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

Aira L. - hairgrass

Species

Aira caryophyllea L. - silver hairgrass

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