Black oat, Bristle oat, Sand oat, Small oat, Gray oat, Lopsided oat, small oat

Black oat with a scientific name Avena strigosa is an annual grass belongs to Avena L. (oat) genus of Poaceae ⁄ Gramineae (Grass family). The plant is native to temperate areas of Europe and is used mostly for forage for its good nutritive value and productivity. This plant is often cultivated as animal feed in the south Brazil, and it is sometimes reported as a weed. Few of the popular common names of the plant are Black oat, Bristle oat, Sand oat, Small oat, Gray oat, lopsided oat and small oat. The plant used to be cultivated as human food in Scotland, but it is now cultivated as a forage for ruminants in South America. It is a nutritive grass with good protein content. Though black oat is the common name of Avena strigosa in English and other languages, it should be noted that some varieties of Avena sativa also produce black grain, notably in France where black varieties of Avena sativa are very popular and more common than white ones.

Black Oats Facts

Name Black oat
Scientific Name Avena strigosa
Native Europe
Common Names Black oat,  Bristle oat, Sand oat, Small oat, Gray oat, Lopsided oat, small oat
Name in Other Languages Albanian: Tërshëra e ranishteve
Belarusian: Avios šarścinisty  (Авёс шарсьціністы)
Croatian: Zob
Czech:  Černý oves, Oves hřebílkatý, oves hubený
Danish:  Purhavre
Dutch: Evene
English:  Black oat,  Bristle oat, Sand oat, Small oat, Gray oat, Lopsided oat, small oat
Estonian: Liivkaer
Finnish:  Ukonkaura
French:  Avoine fourragère, Avoine maigre, Avoine rude, avoine nerveuse, avoine strigueuse
Galician: Afreita, avea louca, Coirce beag
German:  Nackt-Hafer, Rauhhafer,  Sandhafer, Schwarzhafer, Zweispitzhafer
Greek:  Avena i traheia (Αβένα η τραχεία), Vromi i traheia (Βρώμη η τραχεία)
Hindi:  Jaṅgalī ja’ī sṭrīgōsā (जंगली जई स्ट्रीगोसा)
Irish: Coirce beag
Italian:  Avena forestiera, Avena smilza, avena scabra, velnauza
Japanese: Burakku ooto (ブラックオート), Seiyou chahiki (セイヨウチャヒキ)
Lithuanian: Aviža netikšė
Norwegian: Busthavre
Polish:  Owies szorstki, owies owsik
Portuguese:  Aveia-preta, avea; avea môcha; aveinha, aveia-estrigosa, aveia-negra, aveião, aveia-brasileira
Russian:   Овес щетинистый   Oves ščetinistyj
Slovak: Ovos ježatý
Spanish:  Afreita, avena borde; avena muy áspera
Swedish:  Purrhavre, Svarthavre, Ukonkaura
Ukrainian: Oves shchetynystyy (овес щетинистий)
Welsh: Blewgeirchen blewgeirch
Plant Growth Habit Upright, winter annual  tufted grass
Growing Climates Dry wasteland, cultivated ground and meadows, especially on heavier soils
Soil Does best on sandy or loamy soils but can also grow in heavy clay and soils with low nutrient value. It is not highly shade tolerant but can tolerate drought
Plant Size About 0.8-1.5 m, depending on growing conditions
Root Dense root system
Leaf Leaves glabrous; blade finely scabrous, to 40 cm long and 12 mm wide; ligule membranous, to 5 mm long
Flowering season June to July
Inflorescence Slender, contracted panicle to 30 cm long
Flower Spikelets 2–3-flowered; glumes lanceolate, 14–22 mm long, 7–9-nerved; lemma narrow-lanceolate, 16–26 mm long (including the 5–10 mm long, unevenly bifid apical awns), glabrous or with a few silky hairs about the point of insertion of the awn or near the callus
Fruit Shape & Size Caryopsis with adherent pericarp; hairy all over. Hilum linear
Seed Seed has a thin and narrow shape. It is a black and tan colour, with a smooth texture. It is one of the larger cereal seeds, varying from 8 – 10mm in length
Season August to October

 

Black oat Scientific Classification

Scientific Name: Avena strigosa

Rank Scientific Name & (Common Name)
Kingdom Plantae (Plants)
Subkingdom Tracheobionta (Vascular plants)
Infrakingdom Streptophyta  (land plants)
Superdivision Spermatophyta (Seed plants)
Division Magnoliophyta (Flowering plants)
Subdivision Spermatophytina  (spermatophytes, seed plants, phanérogames)
Class Liliopsida (Monocotyledons)
Subclass Commelinidae
Superorder Lilianae  (monocots, monocotyledons, monocotyledons)
Order Cyperales
Family Poaceae ⁄ Gramineae (Grass family)
Genus Avena L. (oat)
Species Avena strigosa Schreb. (black oats)
Synonyms
  • Avena agraria Brot.
  • Avena agraria var. sesquialtera Brot.
  • Avena agraria-mutica Brot.
  • Avena agraria-sesquialtera Brot.
  • Avena alta Cav.
  • Avena alta Cav. ex Roem. & Schult.
  • Avena ambigua Schoemb. ex Nyman
  • Avena arduensis Lej.
  • Avena arduensis Lej. ex Steud.
  • Avena cavanillesii Roem. & Schult.
  • Avena freita Ortega ex Spreng.
  • Avena fusca Ard.
  • Avena glabrescens (Marquand) Herter
  • Avena hispanica Ard.
  • Avena hispanica Roem. & Schult.
  • Avena nervosa Lam.
  • Avena nuda subsp. strigosa (Schreb.) Janch.
  • Avena nuda subsp. strigosa (Schreb.) Mansf.
  • Avena preissia (Schreb.) Opiz
  • Avena sativa subsp. strigosa (Schreb.) Bonnier & Layens, 1894
  • Avena sativa var. hispanica (Ard.) Steud.
  • Avena sativa var. strigosa (Schreb.) Bonnier & Layens
  • Avena sativa var. strigosa (Schreb.) Fiori
  • Avena strigosa subsp. agraria (Brot.) Tab.Morais
  • Avena strigosa subsp. glabrescens Marquand
  • Avena strigosa var. abbreviata Hausskn.
  • Avena strigosa var. agraria (Brot.) Samp.
  • Avena strigosa var. alba C.Marquand
  • Avena strigosa var. albida (C.Marquand) Mordv.
  • Avena strigosa var. albida C.Marquand
  • Avena strigosa var. candida Mordv.
  • Avena strigosa var. candida Mordv. ex Rodionova & Soldatov
  • Avena strigosa var. fusca C.Marquand
  • Avena strigosa var. gilva Mordv.
  • Avena strigosa var. gilva Mordv. ex Rodionova & Soldatov
  • Avena strigosa var. glabrata Malzev
  • Avena strigosa var. glabrescens (C.Marquand) Malzev
  • Avena strigosa var. glabrescens (Marquand) Thell.
  • Avena strigosa var. hepatica Mordv.
  • Avena strigosa var. hepatica Mordv. ex Rodionova & Soldatov
  • Avena strigosa var. hispanica (Ard.) B.Bock
  • Avena strigosa var. intermedia C.Marquand
  • Avena strigosa var. kewensis Vavilov
  • Avena strigosa var. melanocarpa Mordv.
  • Avena strigosa var. melanocarpa Mordv. ex Rodionova & Soldatov
  • Avena strigosa var. nigra C.Marquand
  • Avena strigosa var. nigricans Mordv.
  • Avena strigosa var. nigricans Mordv. ex Rodionova & Soldatov
  • Avena strigosa var. secunda Mordv.
  • Avena strigosa var. secunda Mordv. ex Rodionova & Soldatov
  • Avena strigosa var. semiglabra Malzev
  • Avena strigosa var. sesquialtera (Brot.) Hack.
  • Avena strigosa var. strigosa Schreb., 1771
  • Avena strigosa var. tephrea Mordv.
  • Avena strigosa var. tephrea Mordv. ex Rodionova & Soldatov
  • Avena strigosa var. trichophora Malzev
  • Avena strigosa var. unilateralis (Malzev) Rodionova & Soldatov
  • Danthonia strigosa (Schreb.) P.Beauv.
  • Danthonia strigosa var. elatior Roem. & Schult
  • Preissia italica Corda
  • Preissia strigosa (Schreb.) Opiz

Plant Description

Black oat is an upright, winter annual tufted grass that grows about 0.8-1.5 m, depending on growing conditions. The plant is found growing in dry wasteland, cultivated ground and meadows, especially on heavier soils. It does best on sandy or loamy soils but can also grow in heavy clay and soils with low nutrient value. It is not highly shaded tolerant but can tolerate drought. The plant has dense root system. Black oat is a leafy species. The leaf blades are linear, flat, rough and numerous. Leaves are glabrous; blade finely scabrous, to 40 cm long and 12 mm wide. Ligule is membranous to 5 mm long.

Flower & Fruit

The inflorescence is a loose open panicle. The panicle is drooping and bears pendulous, pedicellate spikelets. The inferior lemma is awned, straight and black (hence the name black oat), 1.5-3 cm long, somewhat lopsided (hence the name lopsided oat). The fruit is a hairy caryopsis. Avena strigosa has morphological differences from the common oat (Avena sativa): it is leafier with side panicles (instead of equilateral), plump kernels (instead of narrow), and smaller seeds.

Black oat is a valuable forage crop. It has earlier growth and a shorter production cycle than ryegrass, a high DM productivity and a high nutritive value with good protein content. Black oat is a valuable cover crop used both in summer and winter. Black oat can be grown for forage only or for forage and grain. Its dense root system is beneficial to soil texture. Black oat used to be cultivated in northern Scotland as human food, and for animal feeding as pasture, hay or grain, but is now cultivated mostly in South America. Black oat can be grown on waste water from which it removes nutrients and thus reduces organic load.

Culinary Uses

  • Seed has a floury texture and a mild, somewhat creamy flavor.
  • It can be used as a staple food crop in either savory or sweet dishes.
  • Seed can be cooked whole, though it is more commonly ground into flour and used as a cereal in all the ways that oats are used, especially as porridge but also to make biscuits, sourdough bread etc.
  • Seed can also be sprouted and eaten raw or cooked in salads, stews etc.
  • Roasted seed is a coffee substitute.

Other facts

  • Straw has a wide range of uses such as for bio-mass, fiber, mulch, paper-making and thatching.
  • Some caution is recommended in its use as mulch since oat straw can infest strawberries with stem and bulb eelworm.
  • Black oat is used in the southeastern United States, Hawaii, and Arizona for forage, pasture and as a cover crop.
  • Oils extracted from black oat seed are used in cosmetics as skin and hair moisturizers.

 


References

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