Poa annua L.
  • Sp. Pl.
  • Pastillo de invierno


This taxon is accepted by Poaceae
Notes: More details could be found in The Plant List v.1.1. Originally in The Plant List v.1.0

General Description

1. Poa annua L., Sp. Pl. 68 (1753). Tipo: Europa.

Por R.W. Pohl y G. Davidse.

Anuales cespitosas. Tallos 5-35 cm, erectos y fasciculados, o decumbentes en sitios húmedos. Hojas glabras; lígula 1-4 mm; láminas 5-11 cm x 1-4 mm, aplanadas, las láminas basales blandas, patentes. Panícula 1.5-11 x 1-5 cm, piramidal, abierta; ramas 1-2 en el nudo más inferior, patentes, desnudas en el 1/10-1/2 inferior. Espiguillas 4-5.5 mm, agrupadas; gluma inferior 1.5-2.7 mm, 1-nervia; gluma superior 1.5-2.7 mm, 3-nervia; flósculos 2-6; lemas 2.6-3.8 mm, las nervaduras y el callo pelosos; páleas pelosas en las quillas. 2n = 28. Áreas húmedas. Ch (Breedlove y Davidse 54708, MO); G (Smith 833, ISC); H (Pohl y Davidse 11957, MO); ES (Montalvo 4808, MO); N (Moreno 517, MO); CR (Pohl y Davidse 10508, ISC); P (Hammel 1409, ISC). 1000-3800 m. (Cosmopolita; presumiblemente introducida de Europa.)

  • Provided by: [H].Flora Mesoamericana
    • Source: [
    • 1
    • 15
    • ]. 

    Annuals, sometimes over wintering, infrequently stoloniferous. Culms loosely tufted, erect or oblique, often decumbent, often geniculate, soft, 6–30(–45) cm tall, smooth, nodes 1 or 2(or 3), 1(or 2) exserted. Leaf sheath slightly compressed, thin, smooth, uppermost closed for ca. 1/3 of length; blade light to dark green, flat or folded, thin, 2–12 cm × (0.8–)1–3.5 mm, margins slightly scabrid, apex acutely prow-tipped; ligules 0.6–3 mm, abaxially smooth, glabrous, apex obtuse, margin irregularly dentate, smooth. Panicle open, moderately congested, broadly ovoid to pyramidal, (1–)3–10 cm, as long as wide; branches ascending, spreading, or a few reflexed, 1 or 2(–3) per node, smooth, longest with usually 3–5 spikelets in distal 1/2. Spikelets ovate to oblong, dark to light green, (3–)4–5.5 mm, florets 3–5, distal fertile florets often female; vivipary absent; rachilla internodes 0.5–1.5 mm, smooth, glabrous, hidden or exposed; glumes unequal, smooth or rarely keeled with hooks, lower glume lanceolate and acute to subflabellate and obtuse, 1.5–2(–3) mm, 1-veined, upper glume elliptic, 2–3(–4) mm, 3-veined, the margin angled; lemmas ovate, 2.2–3.5 mm, apex and margins broadly membranous, intermediate veins prominent, keel and marginal, and usually intermediate, veins villous in the lower 1/2, rarely glabrous throughout; callus glabrous; palea keels smooth, densely pilulose to short villous. Anthers 0.6–1 mm, usually at least 2 × as long as wide, or vestigial. Fl. Apr–May, fr. Apr–Jul. 2n = 28.

  • Provided by: [L].Flora Of CHina @ efloras.org
    • Source: [
    • 14
    • ]. 

    Por Richard W. Pohl y Gerrit Davidse

    Poa annua L., Sp. Pl. 68. 1753.

    Anuales cespitosas; tallos 5–35 cm de largo, erectos y fasciculados, o decumbentes en sitios húmedos; plantas hermafroditas. Hojas glabras; márgenes de las vainas libres; lígula una membrana 1–4 mm de largo; láminas lineares, 5–11 cm de largo y 1–4 mm de ancho, aplanadas, el ápice cóncavo, navicular, las láminas basales blandas, patentes. Panícula terminal, 1.5–11 cm de largo y 1–5 cm de ancho, piramidal, abierta, ramas 1–2 en el nudo más inferior, patentes, desnudas en el 1/10–1/2 inferior; espiguillas 4–5.5 mm de largo, agrupadas, comprimidas lateralmente, con varios flósculos; desarticulación por encima de las glumas entre los flósculos; gluma inferior 1.5–2.7 mm de largo, 1-nervia, gluma superior 1.5–2.7 mm de largo, 3-nervia; flósculos 2–6, bisexuales; lemas 2.6–3.8 mm de largo, las nervaduras y el callo pilosos; páleas pilosas en las quillas. Fruto una cariopsis; hilo linear.

    Rara, nebliselvas, zona norcentral; 800–1500 m; fl y fr may, oct; Guzmán 2073, Moreno 517; cosmopolita, presumiblemente introducida de Europa. Género con ca 500 especies, cosmopolita en regiones árticas y templadas, y en grandes altitudes en los trópicos.

  • Provided by: [E].Flora de Nicaragua
    • Source: [
    • 16
    • ]. 

    Soft, erect or decumbent-spreading annual; culms flattened, commonly 5-20 cm. high, glabrous; sheaths thin with hyaline margins, mostly longer than the internodes; ligule hyaline, about 5 mm. long; blades flat, mostly 5-10 cm. long, 1-3 mm. wide, the margins scabrous; panicle 3-10 cm. long, open with rather short ascending to spreading branches; spikelets short-pedicelled, crowded, 3- to 6-flowered; first glume 1.5-2 mm., the second 2-2.5 mm. long; lemmas about 3 mm. long, subobtuse, distinctly nerved, densely pubescent on the nerves, not webbed at the base.

  • Provided by: [J].Flora de Panama
    • Source: [
    • 17
    • ]. 

    Plantas 6–25(–35) cm, cespitosas, los talloserectos a decumbentes. Hojas con lígula 1.5–4 mm;lámina 4.5–10(–11.5) cm × 1–4 mm. Infl. 2–9 cm,abierta, verde, las ramas patentes. Espiguillas 4.5–5.5 mm; glumas 1–3-nervadas, la superior 1.5–2.5 mm;lemas 2.5–3.8 mm, las nervaduras pubescentes, elcallo glabrado a ± piloso.

  • Provided by: [C].Manual de Plantas de Costa Rica
    • Source: [
    • 18
    • ]. 

    "Tufted annual with few–several decumbent to ascending or seldom erect culms to 3 dm, sometimes rooting at the lower nodes; sheaths loose; blades soft, 2–3 mm wide; infl ovoid, 2–8 cm, with few ascending branches bearing rather crowded spikelets above the middle; spikelets green, 3–5 mm, 3–6-fld; glumes broadly lanceolate, acute, scarious-margined, indistinctly veined, the first 1.5–2.4 mm, the second 1.8–2.8 mm; lemmas thin, elliptic, 5-veined, obtuse, ± hairy on the veins only, not webbed, the lowest one 2.4–3.4 mm; anthers 0.8–1 mm; 2n=14, 28. Native of Eurasia; abundant in moist soil nearly throughout the U.S. and n. to Lab. and Alas.; often a lawn-weed."

  • Provided by: [G].New York Botanical Garden
    • Source: [
    • 19
    • ]. 

    Morphology

    Loosely tufted annual up to about 15 cm. high.

  • Provided by: [K].Plants Of the World Online Portal - FWTA
    • Source: [
    • 2
    • ]. 

    Culms 2·5-30 cm. tall, 2-4-noded, erect, spreading or decumbent, sometimes rooting at the lower nodes, rather slender, terete, glabrous, smooth.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 12
    • ]. 

    Leaf-sheaths usually loose, somewhat compressed, keeled, smooth, usually glabrous.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 12
    • ]. 

    A caespitose delicate annual (very rarely perennial).

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 12
    • ]. 

    Caryopsis 1-2 mm. long.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 12
    • ]. 

    Lemmas 2·3-4·25 mm. long, broadly elliptic or ovate-elliptic with white hyaline margins, with the apex obtuse.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 12
    • ]. 

    Anthers 0·7-1·2(1·6) mm. long.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 12
    • ]. 

    Ligule 2-5 mm. long.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 12
    • ]. 

    Inferior glume 1·5-3 mm. long, 1-nerved, ovate or lanceolate; the superior 2-4·25 mm. long, 3-nerved, elliptic or oblong.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 12
    • ]. 

    Spikelets 3-8(10) mm. long, 3-7(10)-flowered, ovate to oblong in outline, usually crowded, green or often tinged with purple.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 12
    • ]. 

    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.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 12
    • ]. 

    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.

  • Provided by: [D].Plants Of the World Online Portal - FZ
    • Source: [
    • 12
    • ]. 

    Loosely to compactly tufted annual or short-lived perennial; culms 2.5–30 cm. high, erect, spreading or prostrate.

  • Provided by: [I].Plants Of the World Online Portal - FTEA
    • Source: [
    • 13
    • ]. 

    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.

  • Provided by: [I].Plants Of the World Online Portal - FTEA
    • Source: [
    • 13
    • ]. 

    Panicle ovate or triangular, 1–12 cm. long, open and loose or somewhat dense.

  • Provided by: [I].Plants Of the World Online Portal - FTEA
    • Source: [
    • 13
    • ]. 

    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.

  • Provided by: [I].Plants Of the World Online Portal - FTEA
    • Source: [
    • 13
    • ]. 

    Soft, bright green annual, sometimes biennial, up to 300 mm tall. Leaves linear-oblong, flaccid; ligule an unfringed membrane. Inflorescence a pyramidal panicle. Spikelets 4-6 x 1.3-2.3 mm, awnless, 3-many-flowered; glumes shorter than spikelet, lower glume 1.5-3 mm long, 1-nerved; rhachilla not or only tardily breaking up; lemmas glabrous or hairy, keeled, 5-nerved.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 20
    • ]. 

    Annual (sometimes biennial), loosely or compactly tufted (culms usually geniculate at base), up to 300 mm tall. Leaf blades 20-50(-140) mm long, 1-5 mm wide, flaccid. Spikelets 4-6 mm long. Panicle roughly pyramidal, 10-120 mm long; branches solitary or paired, spreading horizontally or almost so at maturity; spikelets aggregated in upper half of branches, 3-5-flowered; anthers 0.6-0.8 mm long.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 21
    • ]. 

    Annual, sometimes biennial to 30 cm. Leaves linear-oblong, flaccid. Spikelets in a pyramidal panicle, anthers to 0.8 mm.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 22
    • ]. 

    Annual; sometimes biennial; up to 0.3 m high; loosely or compactly tufted. Leaf blades 20-50(-140) x 1-5 mm; flaccid. Flowers: panicle open; roughly pyramidal; 10-120 mm long; branches solitary or paired; spreading horizontally or almost so at maturity; spikelets 4-6 mm long; spikelets aggregated in upper half of branches; 3-5-flowered; lemma keels; margins and lateral nerves usually densely hairy; occasionally glabrous or sparsely hairy; anthers 0.6-0.8(1.0) mm long.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 23
    • ]. 

    Habitat

    Disturbed areas.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 20
    • ]. 

    Damp places on roadsides, gardens and waste land or other disturbed areas.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 21
    • ]. 

    Disturbed areas.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 22
    • ]. 

    Dry Grassland; Mesic Grassland; Dwarf Karroid Shrubland; Zastron Moist Grassland. Damp places on roadsides; gardens and waste land or other disturbed areas.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 23
    • ]. 

    Distribution

    European weed, wide-spread except in semi-arid region.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 20
    • ]. 

    Native to Europe.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 21
    • ]. 

    European weed.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 22
    • ]. 

    Native to Europe.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 23
    • ]. 

    Distribution Map

     
    • Introduced distribution
    Introduced into
    • Southern America Brazil Paraní
    • Rio Grande do Sul
    • Santa Catarina
    • Rio de Janeiro
    • São Paulo

    Local Names

    NameLanguageCountry
    Pastillo de inviernoSpanish
    Pastinho-de-invernoPortuguese
    Annual bluegrassEnglish

      Bibliography

     Information From

    MBG Floras Images
    http://www.tropicos.org/ImageSearch.aspx
    Flora images. Missouri Botanical Garden. Accessed on Jun. 2018.
    • A Missouri Botanical Garden
    e-Flora of South Africa
    e-Flora of South Africa. v1.21. 2018. South African National Biodiversity Institute. http://ipt.sanbi.org.za/iptsanbi/resource?r=flora_descriptions&v=1.21
    • B All Rights Reserved
    Manual de Plantas de Costa Rica
    http://www.tropicos.org/Project/Costa%20Rica
    Hammel, B. E.; Grayum, M. H.; Herrera, C.; Zamora, N. Manual de Plantas de Costa Rica. Missouri Botanical Garden Press, 2003-2014
    • C Missouri Botanical Garden
    Plants Of the World Online Portal - FZ
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • D
    Flora de Nicaragua
    http://www.tropicos.org/projectwebportal.aspx?projectid=7&pagename=Home&langid=66
    WD Stevens, CU Ulloa, A Pool and OM Montiel. Missouri Botanical Garden Press, 2001
    • E Missouri Botanical Garden
    Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
    http://floradobrasil.jbrj.gov.br
    Brazil Flora G (2014): Brazilian Flora 2020 project - Projeto Flora do Brasil 2020. v393.147. Instituto de Pesquisas Jardim Botanico do Rio de Janeiro. Dataset/Checklist. doi:10.15468/1mtkaw
    • F Group Brazil Flora, REFLORA Program
    New York Botanical Garden
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • G Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Flora Mesoamericana
    http://www.mobot.org/MOBOT/fm/
    Gerrit Davidse, Mario Sousa Sánchez, A. O. Chater, Universidad Nacional Autónoma de México. Instituto de Biología, Missouri Botanical Garden, Natural History Museum (London, England) UNAM, 1994
    • H Missouri Botanical Garden
    Plants Of the World Online Portal - FTEA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • I
    Flora de Panama
    http://www.tropicos.org/Project/PAC
    Robert E. Woodson, Jr. and Robert W. Schery Annals of the Missouri Botanical Garden Vol. 67, No. 4 (1980), pp. ii-xxxiii
    • J Missouri Botanical Garden
    Plants Of the World Online Portal - FWTA
    https://www.kew.org/science/who-we-are-and-what-we-do/strategic-outputs-2020/plants-of-the-world-online
    http://www.plantsoftheworldonline.org/terms-and-conditions
    • K The Trustees of the Royal Botanic Gardens, Kew
    Flora Of CHina @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=2
    'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • L Missouri Botanical Garden
    Poaceae
    • M CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • N CC0 1.0 Universal (CC0 1.0).