Non-native Plants

Curved Sicklegrass

Parapholis incurva

USDA symbol: PAIN

annual grass

Lower 48 states: non-native, naturalized

Meet Parapholis incurva, better known as curved sicklegrass – a little annual grass that’s made quite the journey from its Mediterranean homeland to establish itself across much of the United States. While you probably won’t find this one at your local nursery, you might just stumble across it in your ...

Curved Sicklegrass: An Uninvited Guest in American Gardens

Meet Parapholis incurva, better known as curved sicklegrass – a little annual grass that’s made quite the journey from its Mediterranean homeland to establish itself across much of the United States. While you probably won’t find this one at your local nursery, you might just stumble across it in your yard, especially if you live near the coast or in disturbed areas.

What Exactly Is Curved Sicklegrass?

Curved sicklegrass is a small, unassuming annual grass that gets its common name from its distinctive curved, sickle-shaped flower spikes. Botanically known as Parapholis incurva, this little plant also goes by the scientific synonyms Aegilops incurva and Pholiurus incurvus, depending on which botanical reference you’re consulting.

As an annual grass, curved sicklegrass completes its entire life cycle in one growing season – sprouting, growing, flowering, setting seed, and dying all within a year. It’s what botanists call a graminoid, which is a fancy way of saying it’s part of the grass and grass-like plant family.

Where You’ll Find It

Originally from the Mediterranean region, curved sicklegrass has naturalized across a surprising number of American states. You can find established populations in Alabama, California, Delaware, Louisiana, Maryland, Michigan, Mississippi, New Jersey, North Carolina, Oregon, Pennsylvania, Texas, and Virginia. It’s particularly fond of coastal areas and disturbed soils.

  • Species observed
  • No observations

This adaptable little grass has a Facultative Upland wetland status across all regions, meaning it usually prefers drier ground but won’t turn its nose up at occasionally wet conditions.

Should You Plant Curved Sicklegrass?

Here’s the short answer: probably not. While curved sicklegrass isn’t classified as invasive or noxious, it’s not exactly what you’d call garden-worthy either. This non-native species tends to pop up on its own in disturbed areas, and it doesn’t offer much in the way of aesthetic appeal or ecological benefits.

Since it’s wind-pollinated, curved sicklegrass doesn’t provide nectar or pollen resources for bees, butterflies, or other beneficial insects. Its small stature and unremarkable appearance won’t add much visual interest to your landscape either.

Better Native Alternatives

If you’re looking to add native grasses to your landscape, consider these beautiful alternatives that will actually support local wildlife:

  • Little bluestem (Schizachyrium scoparium) – gorgeous fall color and bird-friendly seeds
  • Buffalo grass (Poaceae family natives) – excellent for natural lawns in appropriate regions
  • Native sedges (Carex species) – diverse options for various growing conditions
  • Switchgrass (Panicum virgatum) – dramatic height and movement in the landscape

If It Shows Up Anyway

Since curved sicklegrass is an annual that readily self-seeds, you might find it appearing in your garden whether you invited it or not. If you discover it growing in areas where you’d prefer something else, simple hand-pulling before it sets seed is usually effective for small populations.

The plant prefers disturbed soils and can tolerate saline conditions, so improving soil health and establishing desired vegetation will naturally discourage its establishment over time.

The Bottom Line

While curved sicklegrass isn’t going to take over your garden or cause ecological havoc, it’s not a plant that most gardeners would choose to cultivate intentionally. Its Mediterranean origins mean it’s not supporting native wildlife, and its modest appearance doesn’t bring much to the table aesthetically.

If you’re passionate about supporting native ecosystems and creating beautiful, functional landscapes, your gardening efforts are better invested in native grass species that will provide food and habitat for local wildlife while giving you more bang for your buck in terms of visual impact.

Sometimes the most interesting plants are the ones we learn to identify and understand rather than the ones we choose to grow – and curved sicklegrass definitely falls into that category!

Parapholis incurva 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. Parapholis incurva is also known as:

Aegilops incurva | USDA symbol: AEIN3
Pholiurus incurvus Schinz & | USDA symbol: PHIN15

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.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" — matching plants to their ideal growing conditions, so they'll thrive with less care and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection can be if you don't have the right information. While tags on nursery plants list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. You might be surprised to learn that popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. The table below gives insight into the preferred growing conditions of this plant throughout its geographical distribution.

Region
Preferred Habitat

Arid West (AZ, CA, CO, ID, MT, NV, NM, OR, TX, UT, WA, WY)

Facultative Upland

Atlantic and Gulf Coastal Plain (AL, AR, DC, DE, FL, GA, IL, KY, LA, MD, MS, MO, NC, NJ, OK, PA, SC, TN, TX, VA)

Facultative Upland

Eastern Mountains and Piedmont (AL, AR, DC, DE, GA, IL, IN, KS, KY, MD, MO, NC, NJ, NY, OH, OK, PA, SC, TN, VA, WV)

Facultative Upland

Great Plains (CO, KS, MN, MT, NE, NM, ND, OK, SD, TX, WY)

Facultative Upland

Midwest (IL, IN, IA, KS, KY, MI, MN, MO, NE, ND, OK, OH, SD, WI)

Facultative Upland

Northcentral & Northeast ()

Facultative Upland

Western Mountains, Valleys, and Coast (AZ, CA, CO, ID, MT, NV, NM, OR, SD, UT, WA, WY)

Facultative Upland
Wetland Glossary
Obligate Wetland
Facultative Wetland
Facultative
Facultative Upland
Obligate Upland
Almost always occurs in wetlands
Usually occurs in wetlands but may occur in non-wetlands
Can occur in wetlands and non-wetlands
Usually occurs in non-wetlands but may occur in wetlands
Almost never occurs in wetlands

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: Parapholis C.E. Hubbard - sicklegrass

Species: Parapholis incurva (L.) C.E. Hubbard - curved sicklegrass

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