Poaceae

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Annuals or perennials, tufted, stoloniferous or rhizomatous, herbs, occasionally shrubby or tree-like (bamboos). Leaves alternate, 2-ranked (except in tropical Micraira), with sheaths embracing the stem and blades more or less spreading; ligule usually developed at sheath-blade junction, either a membranous collar, a row of hairs or a combination of both. Stems usually hollow between the nodes. Inflorescence a panicle, raceme or spike, comprising several to many spikelets (rarely a solitary spikelet). The typical spikelet consists of two opposite rows of bracts, the lower two of which (the glumes) are empty, and the remainder (the lemmas) each enclosing a small, naked flower and a hyaline scale (the palea). The flower consists of an ovary surmounted by two stigmas and subtended by 2 or 3 fleshy scales (lodicules), and/or 3 (rarely 1, 2, 4 or 6) anthers. The combined flower, lemma and palea comprise a floret. There are one to many florets in a spikelet. The fruit is one-seeded, either with the pericarp adnate to the seed coat (a caryopsis) or with the pericarp larger than and loosely enclosing the seed.

About 650 genera and 9500 species world-wide, inhabiting virtually all environments; c. 240 genera and 1394 (including 352 naturalized) species in Australia; 126 genera and over 400 species in Victoria. The systematic arrangement of tribes and genera generally follows that of Clayton and Renvoize (1986); however, recognition of some genera and the placement of some species is at variance with those authors.

Maize or Corn (includiing Sweetcorn), Zea mays L. is included in the key to genera, but not treated further in this account. This familiar and globally important food plant is commonly grown, but rarely appears spontaneously outside of gardens. It is a summer-growing annual, native of Mexico and has been bred for thousands of years. Commonly cultivated forms now undoubtedly little resemble the original wild form. It is distinctive amongst most grasses in having quite separate male and female inflorescences, the former terminal on the tall, stout erect leafy stem (sometimes branched at or near base), and the latter in leaf axils. The long stands of 'silk' of the 'ears' or 'cobs' are the styles through which pollen tubes grow to fertilise the large, crowded ovules that remain enclosed within specialised leaves or spathes.

Source: Walsh, N.G. (1994). Poaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2018-10-26
 
References

Burbidge, N.T. (1966). Australian Grasses, Angus & Robertson, Sydney.

Burbidge, N.T. (1968). Australian Grasses, Angus & Robertson, Sydney.

Burbidge, N.T. (1970). Australian Grasses, Angus & Robertson, Sydney.

Clayton, S.D. & Renvoize, S.A. (1986). Genera Graminum: grasses of the world, H.M.S.O, London.

Hitchcock, A.S. (1971). Manual of the Grasses of the United States, Dover Publications Inc., New York.

Hubbard, C.E. (1968). Grasses, Pelican Books, Great Britain.

Lamp, C.A.; Forbes, S.J. & Cade, J.W. (1990). Grasses of temperate Australia, Inkata Press, Melbourne & Sydney.

Morris, D.I. (1991). The Grasses of Tasmania, Hobart.

Simon, B.K. (1990). A key to Australian Grasses, Queensland Department of Primary Industries, Brisbane.

Soderstrom, T.R.; Hilu, K.W. & Barkworth, M.E. (1987). Grass Systematics and Evolution, Smithsonian Institute Press, Washington D.C.

Tothill, J.C. & Hacker, J.D. (1983). The Grasses of Southern Queensland, University of Queensland Press, St Lucia.

Watson, L. & Dallwitz, M.J. (1985). Australian-Grass Genera - Anatomy, Morphology, Keys and Classification, Research School of Biological Sciences, A.N.U, Canberra.

Watson, L. & Dallwitz, M.J. (1992). The Grass Genera of the World, C.A.B. International, Wallingford, U.K.

Wheeler, D.J.B.; Jacobs, S.W.L. & Norton, B.E. (1982). Grasses of New South Wales, The University of New England, Armidale, Australia.

 
Hero image
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
Higher taxa
family Poaceae
Subordinate taxa
genus Agrostis
genus Aira
genus Alopecurus
genus Amelichloa
genus Ammophila
genus Amphibromus
genus Amphipogon
genus Andropogon
genus Anisopogon
genus Anthosachne
genus Anthoxanthum
genus Apera
genus Aristida
genus Arundo
genus Austrostipa
genus Avellinia
genus Avena
genus Axonopus
genus Bothriochloa
genus Brachypodium
genus Briza
genus Bromus
genus Catapodium
genus Cenchrus L.
genus Chloris
genus Cortaderia
genus Cymbopogon
genus Cynodon
genus Cynosurus
genus Dactylis
genus Deschampsia
genus Deyeuxia
genus Dichanthium
genus Dichelachne
genus Digitaria
genus Diplachne
genus Distichlis
genus Dryopoa
genus Echinochloa
genus Echinopogon
genus Ehrharta
genus Eleusine
genus Elytrigia
genus Elytrophorus
genus Enneapogon
genus Enteropogon
genus Entolasia
genus Eragrostis
genus Eriochloa
genus Eulalia
genus Festuca
genus Gastridium
genus Gaudinia
genus Glyceria
genus Hainardia
genus Hemarthria
genus Hierochloe
genus Holcus
genus Hordeum
genus Hyparrhenia
genus Imperata
genus Isachne
genus Koeleria
genus Lagurus
genus Lamarckia
genus Leersia
genus Leymus
genus Lolium
genus Lophopyrum
genus Melinis
genus Microlaena
genus Molineriella
genus Nassella
genus Neurachne
genus Oplismenus
genus Panicum
genus Parapholis
genus Paspalidium
genus Paspalum
genus Pentameris
genus Pentapogon
genus Phalaris
genus Phleum
genus Phragmites
genus Piptatherum
genus Poa
genus Polypogon
genus Pseudoraphis
genus Psilurus
genus Puccinellia
genus Rostraria
genus Rytidosperma
genus Saxipoa
genus Schismus
genus Sclerochloa
genus Secale
genus Setaria
genus Sorghum
genus Spinifex
genus Sporobolus
genus Stenotaphrum
genus Tetrarrhena
genus Themeda
genus Thinopyrum
genus Tragus
genus Tribolium
genus Triodia
genus Triraphis
genus Trisetum
genus Triticum
genus Vulpia
genus Zoysia