Twoflowered Rush
Juncus biglumis
Last reviewed: August 2026
Toxicity unknown
Twoflowered Rush (Juncus biglumis) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
The USDA PLANTS Database (opens in new tab) does not flag Twoflowered Rush as toxic to livestock.
Light
full sun
Water
medium
Size
2"–8" H × 1"–4" W
Bloom
Jun, Jul, Aug
Native to
CO, MT, NM, WY
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 445 programs across 44 states, each with a link to the provider and the date we last checked it.
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Twoflowered rush is a compact alpine perennial that forms small, neat clumps of grass-like foliage. This diminutive rush produces tiny flowers during summer months and maintains a tidy, low-growing habit perfect for rock gardens or alpine plantings.
In an HOA neighborhood
Twoflowered Rush takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Extremely small size makes it nearly invisible in typical landscapes
- Alpine nature means it may not thrive in typical yard conditions
- Grass-like appearance could be mistaken for weeds
Wildlife value
As a native rush species, it provides habitat and nesting material for small birds and beneficial insects. The seeds may attract finches and other small seed-eating birds.
Common questions
- How much sun does Twoflowered Rush need?
- Twoflowered Rush grows best in full sun conditions.
- When does Twoflowered Rush bloom?
- Twoflowered Rush blooms in June, July, and August.
- Where is Twoflowered Rush native?
- Twoflowered Rush (Juncus biglumis) is native to CO, MT, NM, WY, per vouchered herbarium specimen records and regional native plant society lists.
- Is Twoflowered Rush toxic to livestock?
- The USDA PLANTS Database does not flag Twoflowered Rush as toxic to livestock.
- Is Twoflowered Rush HOA-friendly?
- Twoflowered Rush takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Twoflowered Rush? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz