Hypochaeris radicata head NC1 : 無料・フリー素材/写真
Hypochaeris radicata head NC1 / 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, yearlong-green, perennial herb, with a solid taproot and stems 30-50 cm tall. Leaves form a rosette and are bluntly lobed, 5-20 cm long and covered with bristly hairs. Flowerheads have solitary heads at the tips of solid, branched stems. Heads are 5-15 mm wide, with yellow ligulate flowers. Flowering is over most of the year. A native of Europe, it is common in pastures, along roadsides and in disturbed areas. More common on low fertility, acid soils or where grazing promotes bare ground. Flat rosettes can cover a relatively large area and suppress more desirable plants. Selected by horses, but suspected (though never proven) that it can cause stringhalt in horses where it is dominant. Palatable and nutritious for cattle and sheep, but low growing habit restricts its availability. Best controlled with vigorous pastures as it is difficult and rarely economical to kill with herbicides. Strong pastures out-compete it as it is susceptible to shading and requires bare ground for germination. Fertilise to promote pastures and graze to produce shading and competition. |
| 撮影日 | 2006-07-23 04:59:49 |
| 撮影者 | Macleay Grass Man , Dungog, Australia |
| タグ | |
| 撮影地 | |
| カメラ | E5400 , NIKON |
| 露出 | 0.002 sec (1/403) |
| 開放F値 | f/7.9 |
| 焦点距離 | Asteraceae "False Dandelion" Flatweed floretsligulate floretsyellow flowersyellow fruitsbeaked fruitspappusplumose "Hypochaeris radicata" introduced leafmarginssinuate leafmarginstoothed leavespinnatifid leavesrosette plantshairy plantsherb plantsperennial stemsbranched stemssolid |