Poa annua L.

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Poa annua

Picture: Bart Wursten
Ndundu Lodge, Vumba

Poa annua

Picture: Bart Wursten
Ndundu Lodge, Vumba

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Synonyms: Poa bipollicaris Hochst.
Common names:
Status: Introduced
Erect or decumbent annual (very rarely perennial), 5–30 cm. Leaves: ligule 2–3 mm; lamina 1.5–10 × 0.1–0.5 cm, flat, keeled, often transversely wrinkled. Panicle 1–8 cm, ± triangular; branches usually 2 together, often becoming reflexed after flowering. Spikelets 3–5 mm, 3–5-flowered, lanceolate; lower glume ovate or lanceolate, 1-veined; upper 3-veined; lemma ovate, 5-veined, margin and apex broadly hyaline.
Type location:
Derivation of specific name: annua: annual
Habitat: A weed of flower beds, lawns and other seasonally moist or watered disturbed areas.
Altitude range:
Flowering time:
Worldwide distribution: Nowadays a near cosmopolitan species; introduced in Africa.
Zambian distribution (Flora Zambesiaca): N,S
Zambian distribution (Provinces): N,S
Growth form(s):
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species

Burrows, J.E. & Willis, C.K. (eds) (2005). Plants of the Nyika Plateau Southern African Botanical Diversity Network Report No. 31 SABONET, Pretoria Page 358.

Chapano, C. & Mamuto, M. (2003). Plants of the Chimanimani District National Herbarium and Botanic Garden, Zimbabwe Page 44.

Launert, E. (1971). Poaceae Flora Zambesiaca 10(1) Pages 49 - 51. (Includes a picture).

Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 108.

Wursten, B., Timberlake, J. & Darbyshire, I. (2017). The Chimanimani Mountains: an updated checklist. Kirkia 19(1) Page 86.

Other sources of information about Poa annua:

Our websites:

Flora of Malawi: Poa annua
Flora of Zimbabwe: Poa annua

External websites:

African Plants: A Photo Guide (Senckenberg): Poa annua
African Plant Database: Poa annua
BHL (Biodiversity Heritage Library): Poa annua
EOL (Encyclopedia of Life): Poa annua
GBIF (Global Biodiversity Information Facility): Poa annua
Google: Web - Images - Scholar
iNaturalist: Poa annua
IPNI (International Plant Names Index): Poa annua
JSTOR Plant Science: Poa annua
Mansfeld World Database of Agricultural and Horticultural Crops: Poa annua
Plants of the World Online: Poa annua
Tropicos: Poa annua
Wikipedia: Poa annua

Copyright: Mike Bingham, Annette Willemen, Bart Wursten, Petra Ballings and Mark Hyde, 2011-23

Bingham, M.G., Willemen, A., Wursten, B.T., Ballings, P. and Hyde, M.A. (2023). Flora of Zambia: Species information: Poa annua.
https://www.zambiaflora.com/speciesdata/species.php?species_id=103630, retrieved 5 October 2023

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