Eragrostis cilianensis flowerhead5 NWS : 無料・フリー素材/写真
Eragrostis cilianensis flowerhead5 NWS / Macleay Grass Man
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Introduced warm-season annualstrongly-scented tufted C4 grass; stems are to 60 cm tall and nodes often have a brown ring of glands below them. Leaves are hairless, with margins sometimes lined with glands and rigid 3 mm long hairs occur either side of the ligule. Flowerheads are contacted or open panicles 7-18 cm long; hairs are restricted to the axils of the main branches and lower axils sometimes have a brown ring of glands below them. Spikelets are 2-4 mm wide, 4-35-flowered, flattened, unawned and with lemmas 2-2.5 mm long; a depression runs down the midline on both sides. Flowers in summer. A native of Europe, it is a weed of disturbed areas of agriculture and habitation (e.g. crops, sown pastures, gardens, roadsides and waste areas). Generally a nuisance weed, but can be competitive at times in newly sown pastures and crops. Not very palatable; eaten by stock when young but becomes unpalatable after flowering; gives off an offensive odour which deters livestock. Prevention of seeding for 2-3 years eliminates the seed bank. Controls can include: heavy grazing when young, slashing at flowering, grazing and fertility management to increase the density and competitiveness of pastures, hand removal and the use of registered herbicides. |
| 撮影日 | 2016-02-02 08:09:21 |
| 撮影者 | Macleay Grass Man , Dungog, Australia |
| タグ | |
| 撮影地 | New South Wales, Australia 地図 |
| カメラ | Canon PowerShot A650 IS , Canon |
| 露出 | 0.004 sec (1/250) |
| 開放F値 | f/8.0 |
| 焦点距離 | 13745.70455 dpi |