Poa annua L.

First published in Sp. Pl.: 68 (1753)
This species is accepted
The native range of this species is Temp. Old World to Tropical Mountains. It is an annual or biennial and grows primarily in the temperate biome. It is used to treat unspecified medicinal disorders, as animal food and a medicine and has environmental uses.

Descriptions

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/168729/1217340

Conservation
LC - least concern
[IUCN]

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution
Nativa en Colombia; Alt. 1000 - 4000 m.; Andes, Sierra Nevada de Santa Marta.
Morphology General Habit
Hierba
Conservation
No Evaluada
[CPLC]

Gramineae, W. D. Clayton, S. M. Phillips & S. A. Renvoize. Flora of Tropical East Africa. 1974

Morphology General Habit
Loosely to compactly tufted annual or short-lived perennial; culms 2.5–30 cm. high, erect, spreading or prostrate.
Morphology Leaves
Leaf-blades 1–14 cm. long and 1–5 mm. wide, weak, often crinkled when young, blunt at the tip; ligule 2–5 mm. long.
Morphology Reproductive morphology Inflorescences
Panicle ovate or triangular, 1–12 cm. long, open and loose or somewhat dense.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 3–10-flowered, ovate or oblong, 3–10 mm. long; lower glume lanceolate to ovate, 1.5–3 mm. long, 1-nerved; upper glume elliptic or oblong, 2–4 mm. long, 3-nerved, broadest at about the middle; lemmas broadly elliptic with prominent white hyaline margins, 2.5–4 mm. long, obtuse to emarginate (obtuse in side view), glabrous or hairy on the nerves; palea-keels glabrous or ciliate; anthers 0.7–1.2(–1.6) mm. long.
Habitat
A ruderal species of pathsides and disturbed ground in upland districts; 2000–3550 m.
Distribution
K3 K4 T2 T3 T7 U2 cosmopolitan, doubtless introduced to East Africa
[FTEA]

Bernal, R., G. Galeano, A. Rodríguez, H. Sarmiento y M. Gutiérrez. 2017. Nombres Comunes de las Plantas de Colombia. http://www.biovirtual.unal.edu.co/nombrescomunes/

Vernacular
pasto gallina, pata de gallina, piojillo, poa, yerba de gallina, zorrito
[UNAL]

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Gramineae, W. D. Clayton. Flora of West Tropical Africa 3:2. 1972

Morphology General Habit
Loosely tufted annual up to about 15 cm. high.
[FWTA]

The Useful Plants of Boyacá project

Ecology
Alt. 1000 - 4000 m.
Morphology General Habit
Herb.
Distribution
Native from Colombia.
Conservation
Not Evaluated.
[UPB]

Morphology General Habit
Annual; caespitose. Butt sheaths herbaceous. Culms erect, or geniculately ascending, or decumbent; 3-30 cm long; 2-4 -noded. Culm-internodes terete; smooth. Lateral branches lacking, or sparse. Leaves mostly basal. Leaf-sheaths keeled; smooth. Ligule an eciliate membrane; 2-5 mm long; obtuse. Leaf-blades flat, or conduplicate; 1-14 cm long; 1-5 mm wide. Leaf-blade surface smooth; glabrous. Leaf-blade margins scaberulous. Leaf-blade apex obtuse, or abruptly acute; hooded.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; pyramidal, or ovate; 1-12 cm long. Primary panicle branches spreading; 1-2 -nate. Panicle branches smooth. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.3-4 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 3-10 fertile florets; with diminished florets at the apex. Spikelets oblong, or ovate; laterally compressed; 3-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes obscured by lemmas; smooth. Floret callus glabrous, or pubescent.
Fertile
Spikelets comprising 3-10 fertile florets; with diminished florets at the apex. Spikelets oblong, or ovate; laterally compressed; 3-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes obscured by lemmas; smooth. Floret callus glabrous, or pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate, or ovate; 1.5-3 mm long; 0.7-0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume elliptic, or oblong; 2-4 mm long; 0.9-1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; oblong in profile; 2.5-4 mm long; membranous; much thinner above; much thinner on margins; keeled; 5 -veined. Lemma lateral veins stopping well short of apex. Lemma surface glabrous, or pubescent; hairy below; hairy on veins. Lemma apex acute. Palea 0.9 length of lemma. Palea keels eciliate, or ciliolate. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 0.7-1.3 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform.
Distribution
Europe: northern, central, southwestern, southeastern, and eastern. Africa: north, Macaronesia, west-central tropical, northeast tropical, east tropical, southern tropical, south, middle Atlantic ocean, and western Indian ocean. Asia-temperate: Siberia, Soviet far east, Soviet Middle Asia, Caucasus, western Asia, Arabia, China, Mongolia, and eastern Asia. Asia-tropical: India, Indo-China, Malesia, and Papuasia. Australasia: Australia and New Zealand. Pacific: southwestern, south-central, and north-central. North America: Subarctic, western Canada, eastern Canada, northwest USA, north-central USA, northeast USA, southwest USA, south-central USA, southeast USA, and Mexico. South America: Mesoamericana, Caribbean, northern South America, western South America, Brazil, and southern South America. Antarctic: Subantarctic islands.
Reference
Poeae. CEH.
[GB]

Gramineae, E. Launert. Flora Zambesiaca 10:1. 1971

Morphology General Habit
A caespitose delicate annual (very rarely perennial).
Morphology Culms
Culms 2·5-30 cm. tall, 2-4-noded, erect, spreading or decumbent, sometimes rooting at the lower nodes, rather slender, terete, glabrous, smooth.
Morphology Leaves Leaf sheaths
Leaf-sheaths usually loose, somewhat compressed, keeled, smooth, usually glabrous.
Morphology Leaves Ligules
Ligule 2-5 mm. long.
Morphology Leaves Leaf lamina
Leaf-laminae 1·5-10(15) x 0·1-0·5 cm., linear or linear-oblong, with the apex abruptly acute or often cucullate, expanded or folded, flaccid, scaberulous along the margins otherwise smooth, glabrous.
Morphology Reproductive morphology Inflorescences
Panicle 2-8(12) cm. long, open or more rarely contracted, ovate in outline, somewhat stiff; branches usually 2 (rarely 3-5)-nate or solitary, spreading at first, later usually slightly deflexed, smooth; pedicels 0·3-5 mm. long, smooth.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 3-8(10) mm. long, 3-7(10)-flowered, ovate to oblong in outline, usually crowded, green or often tinged with purple.
Morphology Reproductive morphology Inflorescences Bracts Glume
Inferior glume 1·5-3 mm. long, 1-nerved, ovate or lanceolate; the superior 2-4·25 mm. long, 3-nerved, elliptic or oblong.
Morphology Reproductive morphology Inflorescences Bracts Lemma
Lemmas 2·3-4·25 mm. long, broadly elliptic or ovate-elliptic with white hyaline margins, with the apex obtuse.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0·7-1·2(1·6) mm. long.
Morphology Reproductive morphology Fruits
Caryopsis 1-2 mm. long.
[FZ]

Distribution
Biogeografic region: Andean. Elevation range: 1000–4000 m a.s.l. Naturalised in Colombia. Colombian departments: Antioquia, Arauca, Bogotá DC, Boyacá, Caldas, Caquetá, Cauca, Cesar, Cundinamarca, Huila, La Guajira, Magdalena, Nariño, Norte de Santander, Putumayo, Quindío, Risaralda, Santander, Tolima, Valle del Cauca.
Habit
Herb.
Conservation
IUCN Red List Assessment (2021): LC.
Ecology
Habitat according IUCN Habitats Classification: forest and woodland, shrubland, native grassland, artificial - terrestrial.
[UPFC]

Morphology General Habit
Perennial; culms solitary. Culms 18-23 cm long; 1 -noded. Leaf-sheaths glabrous on surface, or puberulous. Ligule an eciliate membrane; 0.5-1 mm long; erose. Leaf-blades straight; involute; 3-6 cm long; 2 mm wide; 2 cm long at summit of culm. Leaf-blade surface smooth, or scaberulous; rough adaxially. Leaf-blade apex obtuse, or abruptly acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; lanceolate; 4.5-6 cm long. Primary panicle branches ascending. Panicle branches capillary. Spikelets solitary. Fertile spikelets pedicelled. Pedicels terete; smooth.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 9-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth.
Fertile
Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 9-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2.3-2.5 mm long; 0.75 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse, or acute. Upper glume lanceolate; 3.3-3.5 mm long; 0.66 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume apex obtuse, or acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 5.5-6 mm long; chartaceous; without keel; 5 -veined. Lemma lateral veins prominent. Lemma surface smooth, or scaberulous; rough above. Lemma apex acute; awned; 1 -awned. Principal lemma awn 0.5-1.5 mm long overall. Palea 2 -veined. Palea keels smooth, or scaberulous. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Anthers 3; 0.6-0.8 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum linear.
Distribution
South America: western South America.
Reference
Poeae. Tovar 1995.
[GB]

Uses

Use Medicines
Medicinal (State of the World's Plants 2016).
Use Medicines Unspecified Medicinal Disorders
Medicinal (State of the World's Plants 2016, Instituto Humboldt 2014).
[UPB]

Use Animal Food
Used as animal food.
Use Environmental
Environmental uses.
Use Medicines
Medical uses.
[UPFC]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0
  • Catálogo de Plantas y Líquenes de Colombia

    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Flora Zambesiaca

    • Flora Zambesiaca
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Flora of West Tropical Africa

    • Flora of West Tropical Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora.
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/
  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Science Photographs

    • Copyright applied to individual images
  • Universidad Nacional de Colombia

    • ColPlantA database
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Useful Plants and Fungi of Colombia

    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Useful Plants of Boyacá Project

    • ColPlantA database
    • http://creativecommons.org/licenses/by-nc-sa/3.0