Polygonum aviculare flower CWS 3 : 無料・フリー素材/写真
Polygonum aviculare flower CWS 3 / 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, annual or biennial, mat-forming herb, with a deep taproot. Stems are prostrate, to 1 m long and arise from the one point. Branch leaves are about half the size of stem leaves; leaves are narrow-elliptic to narrow-ovate, 15–50 mm long, 3–15 mm wide and 4–5 times as long as wide.. Flowers are small (2.6-4 mm long), pink or white and solitary or in small clusters in the leaf axils. Flowering is from spring to autumn. A native of Europe, it is a weed of disturbed areas, particularly roadsides, wasteland, cropping paddocks, gateways and degraded pastures. An indicator of poor ground cover. Can form dense mats in newly sown pastures and is a weed of summer fallows or summer crops such as lucerne. Strongly competitive, it has vigorous seedlings with a strong tap root; mature plants inhibit the germination of many seedlings (allelopathic effect) particularly medic species. May be grazed by cattle and sheep, usually without a problem, but seeds can cause enteritis in all types of livestock; leaves occasionally cause dermatitis. Controlled with healthy vigorous pastures. Registered herbicides are available for control. |
| 撮影日 | 2022-04-12 10:17:01 |
| 撮影者 | Macleay Grass Man , Dungog, Australia |
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| 撮影地 | |
| カメラ | TG-5 , OLYMPUS CORPORATION |
| 露出 | 0.005 sec (1/200) |
| 開放F値 | f/2.3 |