Taxon: Poa annua L.

Genus: Poa
Family: Poaceae (alt.Gramineae)
  Subfamily: Pooideae
      Tribe: Poeae
        Subtribe: Poinae
Nomen number: 28904
Place of publication: Sp. pl. 1:68. 1753
Name Verified on: 13-May-1992 by ARS Systematic Botanists. Last Changed: 09-May-2011
Species priority site is: Western Regional PI Station (W6)
Accessions: 90 in National Plant Germplasm System (GoogleMap)

Other conspecific taxa:

Common names:

Economic Importance:

  • Harmful organism host: crop diseases (fide WorldWeeds 593-594. 1997)
  • Harmful organism host: crop pests (fide WorldWeeds 593-594. 1997)
  • Environmental: lawn/turf (fide Diversity 16:29-30. 2000)
  • Weed: potential seed contaminant (fide Weed CIBA)

Distributional Range:


    . probable origin Europe


  • Africa

    • Southern Africa: Lesotho; Namibia; South Africa
  • Antarctic

    • Antarctic Continent: Antarctica
  • Australasia

    • Australia: Australia
  • Northern America

    • : Mexico; United States
  • Pacific

    • North-Central Pacific: United States - Hawaii
  • Southern America

    • Caribbean: West Indies
    • Southern South America: Chile
    • Western South America: Colombia; Peru

  • Cultivated:

    . also cult.


  • Southern America

    • Southern South America: Argentina; Paraguay; Uruguay


  • Plants of southern Africa: an online checklist. (Pl SAfr Online)
  • Acevedo-Rodríguez, P. & M. T. Strong Flora of the West Indies (on-line resource). (F WIndies Online)
  • Aldén, B., S. Ryman & M. Hjertson Våra kulturväxters namn - ursprung och användning. Formas, Stockholm (Handbook on Swedish cultivated and utility plants, their names and origin). 2009 (Vara kulturvaxt namn)
  • Allan, H. H. B. et al. Flora of New Zealand. 1961- (F NZeal)
  • Chwedorzewska, K. J. 2008. Poa annua in Antarctic: searching for the source of introduction Polar Biol. 31:263-268.
  • CIBA-GEIGY, Basel, Switzerland Documenta CIBA-GEIGY (Grass weeds 1. 1980, 2. 1981; Monocot weeds 3. 1982; Dicot weeds 1. 1988) (Weed CIBA)
  • Davidse, G. et al., eds. Flora mesoamericana. 1994 (F Mesoamer)
  • Edgar, E. 1986. Poa L. in New Zealand New Zealand J. Bot. 24:456.
  • Euro+Med Editorial Committee Euro+Med Plantbase: the information resource for Euro-Mediterranean plant diversity (on-line resource). (EuroMed Plantbase)
  • FNA Editorial Committee Flora of North America. 1993- (F NAmer)
  • Food and Agriculture Organization of the United Nations (FAO) 2010. Ecocrop (on-line resource). (Ecocrop)
  • Gange, A. C. et al. 1999. Can arbuscular mycorrhizal fungi be used to control the undesirable grass Poa annua on golf courses? J. Appl. Ecol. 36:909-919.
  • Giraldo-Cañas, D. 2011. Catálogo de la familia Poaceae en Colombia (Darwiniana) 49:139-247.
  • Hanelt, P., ed. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6. 2001 (Mansf Ency)
  • Hansen, A. & P. Sunding Flora of Macaronesia: checklist of vascular plants, ed. 4. Sommerfeltia vol. 17. 1993 (L Macar ed4)
  • Holm, L. et al. A geographical atlas of world weeds. 1979 (Atlas WWeed)
  • Holm, L. et al. World weeds: natural histories and distribution. 1997 (WorldWeeds)
  • Huff, D. R. 2000. This is not your father's bluegrass. A century of microevolution expedites development of greens-quality Poa annua (Diversity) 16:29-30.
  • Huxley, A., ed. The new Royal Horticultural Society dictionary of gardening. 1992 (Dict Gard)
  • Instituto de Botánica Darwinion Flora del Conosur. Catálogo de las plantas vasculares. 2008 (F ConoSur)
  • Integrated Botanical Information System (IBIS) Australian plant common name database (on-line resource). (Aust Pl Common Names)
  • International Seed Testing Association A Multilingual Glossary of Common Plant-Names 1. Field crops, grasses and vegetables, ed. 2. 1982 (Mult Glossary Crops)
  • Jahandiez, E. & R. Maire Catalogue des plantes du Maroc. 1931-1941 (L Maroc)
  • Koyama, T. Grasses of Japan and its neighboring regions. 1987 (Grass Japan)
  • Lee, Y. N. Flora of Korea. 1997 (F Korea)
  • Ohwi, J. Flora of Japan (Engl. ed.). 1965 (F JapanOhwi)
  • Porcher, M. H. et al. Searchable World Wide Web Multilingual Multiscript Plant Name Database (MMPND) (on-line resource). (Pl Names)
  • Randall, R. P. The introduced flora of Australia and its weed status. 2007 (Weed CRCAustralia)
  • Rehm, S. Multilingual dictionary of agronomic plants. 1994 (Dict Rehm)
  • Seed Regulatory and Testing Division, Agricultural Marketing Service, U.S.D.A. State noxious-weed seed requirements recognized in the administration of the Federal Seed Act (updated annually). (State Noxweed Seed)
  • Soreng, R. J. et al. 2003. Catalogue of New World grasses (Poaceae): IV. Subfamily Pooideae Contr. U.S. Natl. Herb. 48:511.
  • Tovar, Ó. 1993. Las gramíneas (Poaceae) del Perú (Ruizia) 13:127.
  • Townsend, C. C. & E. Guest Flora of Iraq. 1966- (F Iraq)
  • Tutin, T. G. et al., eds. Flora europaea. 1964-1980 (F Eur)
  • Ugarte, E. et al. 2011. Vascular alien flora, Chile (Check List) 7:365-380.
  • Vibrans, H., ed. Malezas de México (on-line resource). (Malezas Mex)
  • Villaseñor, J. L. & F. J. Espinoza-Garcia 2004. The alien flowering plants of Mexico Diversity & Distrib. 10:113-123.
  • Wagner, W. L. et al. Flora of the Hawaiian Islands (on-line resource). (F Hawaii Online)
  • Walker, E. Flora of Okinawa and the southern Ryukyu Islands. 1976 (F Okin)
  • Wu Zheng-yi & P. H. Raven et al., eds. Flora of China (English edition). 1994- (F ChinaEng)
  • Zon, A. P. M. van der Graminées du Cameroun. 1992 (Grass Camer)

Check other web resources for Poa annua L. :


  • Florets: U.S. National Seed Herbarium image