Poaceae
Weak bluegrass
Poa infirma
- Family
- Poaceae
- Genus
- Poa
Pet and kid safety: not checked yet. Check pet-safe plants
Is yours looking unwell? Scan your plant — free
Common names
By language (7)
- Chinese
- 低矮早熟禾
- English
- Weak bluegrass
- Finnish
- Kevätnurmikka
- French
- Pâturin grêle
- German
- Frühlings-Rispengras
- Persian
- چمن ترد
- Welsh
- Gweunwellt cynnar
Synonyms
- Catabrosa thomsonii Stapf
- Colpodium thomsonii (Stapf) Hack.
- Eragrostis infirma (Kunth) Steud.
- Megastachya infirma (Kunth) Roem. & Schult.
- Ochlopoa infirma (Kunth) H.Scholz
- Ochlopoa perinconspicua (H.Scholz) H.Scholz
- Poa annua Schltdl. & Cham.
- Poa annua subsp. exilis (Tomm. ex Freyn.) Asch. & Graebn.
- Poa annua var. exilis Tomm. ex Freyn.
- Poa annua var. laxiflora Sennen
- Poa annua var. plicata Sennen
- Poa annua var. remotiflora Trab.
- Poa annua var. tommasinii Asch. & Graebn.
- Poa exilis (Tomm. ex Freyn.) Murb.
- Poa inconspicua H.Scholz
- Poa perinconspicua H.Scholz
- Poa remotiflora (Hack. ex Trab.) Murb.
Flowers
- In flower
- February to April, September (from 38 flowering iNaturalist observations worldwide)
Characteristics
- Growth habit
- Graminoid
- Lifespan
- Annual
- In the US and Canada
- Canada: introduced, Lower 48 states: introduced
Photos
FlowerPhoto: Joe Dillon, CC BY 4.0, from iNaturalist 
FlowerPhoto: Joe Dillon, CC BY 4.0, from iNaturalist 
FlowerPhoto: Joe Dillon, CC BY 4.0, from iNaturalist 
FlowerPhoto: Daniel Cahen, CC BY 4.0, from iNaturalist 
LeavesPhoto: Chris Ecroyd, CC BY 4.0, from iNaturalist 
Photo: R. Soreng and P. M. Peterson, CC BY 4.0, from Wikimedia Commons 
Photo: Daniel Cahen, CC BY 4.0, from Wikimedia Commons Photo: Lily Cheng Clavel, CC BY-SA 4.0, from Pl@ntNet via GBIF 
Photo: Jared Shorma, CC BY 4.0, from iNaturalist 
Photo: Daniel Cahen, CC BY 4.0, from Wikimedia Commons Photo: Lily Cheng Clavel, CC BY-SA 4.0, from Pl@ntNet via GBIF 
Photo: Piermario Maculan, CC0, from iNaturalist
More in Poa
- Kentucky bluegrassPoa pratensisPoaceae
- Annual bluegrassPoa annuaPoaceae
- Wood bluegrassPoa nemoralisPoaceae
- Rough bluegrassPoa trivialisPoaceae
- Bulbous bluegrassPoa bulbosaPoaceae
- Alpine bluegrassPoa alpinaPoaceae
- Canada bluegrassPoa compressaPoaceae
- Fowl bluegrassPoa palustrisPoaceae
- Broadleaf bluegrassPoa chaixiiPoaceae
- Poa remotaPoaceae
- Narrow-leaved meadow-grassPoa angustifoliaPoaceae
- Supine bluegrassPoa supinaPoaceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.