Avena strigosa Schreb.

Lopsided oat (en), Avoine maigre (fr), Avoine rude (fr)

Species

Angiosperms > Poales > Poaceae > Avena

Characteristics

Rather slender, erect, glaucous tufts, 80-120 cm. Leaf-sheath glabrous or finely hairy. Ligule 2.5-5.5 mm, obtuse, denticulate, abaxially minutely scabrid. Leaf-blade 15-30 cm × 4.5-13.5 mm, finely scabrid on ribs and margins, occasionally with scattered sparse hairs. Culm internodes glabrous. Panicle (12)-18-26 cm, erect or drooping at tip, rather dense, equilateral, rather narrow; rachis smooth, branches and pedicels fine, minutely scabrid. Spikelets 35-40 mm, 2-flowered, falling at maturity only after fracture of rachis. Glumes 7-(9)-nerved. Lemma 11-15 mm, narrow-lanceolate, light brown or straw-coloured, later becoming darker, smooth and shining below level of awn insertion, green and scabrid above, often with a very few fine hairs near base of awn, each lobe-tip produced to a fine purplish bristle 5-7.5 mm, and often with lateral setae to 1 mm; both lemmas awned, awn 25-35 mm, geniculate, column mid-brown, twisted. Palea keel with one row of cilia, interkeel finely scabrid to minutely hairy above. Callus glabrous or with a few short hairs. Rachilla prolongation glabrous, tipped by few to numerous short hairs. Anthers 2.2-4 mm.
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Culms to 150 cm high. Leaves scattered along culms; blade to 40 cm long, 3–12 mm wide, with nerves prominent. Panicles to 30 cm long. Spikelets 20–25 mm long, with 2 or 3 bisexual florets; rachilla not disarticulating between florets. Glumes about equalling florets, 14–24 mm long, 5–9-nerved. Lemma lanceolate, 16–26 mm long (including terminal bristles), bifid with lobes ending in bristles 5–10 mm long, 1-awned, glabrous or silky at point of awn insertion or near callus; awn 20–35 mm long, arising c. 1/3 lemma length from base, almost straight or bent once below middle, with column twisted. Palea c. 2/3 length of lemma, tough; keels ciliate with 1 or 2 rows of hairs.
An annual grass. It has a waxy covering. It grows 1.2 m high. The spikelets have prickly points. Seeds are very small. They are 3-4 mm long.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination anemogamy
Spread epizoochory
Mature width (meter) -
Mature height (meter) 0.9
Root system -
Rooting depth (meter) 0.3
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

It is a temperate plant. It is cultivated on poor mountain soils. In Argentina it grows from sea level to 800 m above sea level. Tasmanian Herbarium.
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Dry wasteland, cultivated ground and meadows, especially on heavier soils.
A weed of cereal, mostly oat crops; apparently rare. 
Light 7-8
Soil humidity 1-6
Soil texture 1-6
Soil acidity 2-7
Soil nutriment -
Hardiness (USDA) 5-11

Usage

Uses animal food environmental use fiber gene source medicinal
Edible seeds
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings.
Mode seedlings
Germination duration (days) 7 - 14
Germination temperacture (C°) 15 - 21
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Flower

Avena strigosa flower picture by Alain Lagrave (cc-by-sa)

Distribution

Avena strigosa world distribution map, present in Australia, Austria, Belarus, Brazil, Switzerland, Czech Republic, Germany, Denmark, Spain, Finland, France, Greece, Hungary, Ireland, Italy, Malaysia, Netherlands, Norway, New Zealand, Poland, Portugal, Sweden, Ukraine, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:391799-1
WFO ID wfo-0000852368
COL ID K2S4
BDTFX ID 8924
INPN ID 85378
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Avena preissia Avena agraria Avena agraria-mutica Avena arduensis Avena fusca Avena hispanica Avena strigosa Preissia strigosa Avena hispanica Avena agraria-sesquialtera Avena cavanillesii Danthonia strigosa Avena alta Avena ambigua Avena freita Avena glabrescens Avena nervosa Avena agraria var. sesquialtera Avena sativa var. hispanica Avena sativa var. strigosa Avena strigosa subsp. agraria Avena strigosa subsp. glabrescens Avena strigosa var. glabrescens Avena strigosa var. agraria Avena strigosa var. glabrescens Avena strigosa var. hispanica

Lower taxons

Avena strigosa var. trichophora Avena strigosa var. solida