Parthenium hysterophorusÃâàis a much-branched, short-lived & x28;annual& x29;, upright & x28;erect& x29;ÃâàherbaceousÃâàplant that forms aÃâàbasalÃâàrosetteÃâàof leaves during the early stage of growth. It usually grows 0.5-1.5 m tall, but can occasionally reach up to 2 m or more in height. Mature stems are greenish and longitudinally grooved, covered in small stiff hairs & x28;hirsute& x29;, and become much branched at maturity. TheÃâàalternately arrangedleaves are simple with stalks & x28;petioles& x29; up to 2 cm long and form aÃâàbasalrosetteÃâàduring the early stages of growth. The lower leaves are relatively large & x28;3-30 cm long and 2-12 cm wide& x29; and are deeply divided & x28;bi-pinnatifid or bi-pinnatisect& x29;. Leaves on the upper branches decrease in size and are also less divided than the lower leaves. The undersides of the leaves, and to a lesser degree their upper surfaces, are covered with short, stiff hairs that lie close to the surface & x28;they areÃâàappressedÃâàpubescent& x29;.
圖片編號:
128750959
拍攝者:
Sarfrazalii
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授權類型 | 尺寸 | 像素 | 格式 | 點數 | |
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標準授權 | XS | 360 x 480 | JPG | 13 | |
標準授權 | S | 600 x 800 | JPG | 15 | |
標準授權 | M | 1500 x 2000 | JPG | 18 | |
標準授權 | L | 1936 x 2581 | JPG | 20 | |
標準授權 | XL | 2449 x 3265 | JPG | 22 | |
標準授權 | MAX | 6240 x 8320 | JPG | 23 | |
標準授權 | TIFF | 8825 x 11766 | TIF | 39 | |
進階授權 | WEL | 6240 x 8320 | JPG | 88 | |
進階授權 | PEL | 6240 x 8320 | JPG | 88 | |
進階授權 | UEL | 6240 x 8320 | JPG | 88 |
XS
S
M
L
XL
MAX
TIFF
WEL
PEL
UEL
標準授權 | 360 x 480 px | JPG | 13 點 |
標準授權 | 600 x 800 px | JPG | 15 點 |
標準授權 | 1500 x 2000 px | JPG | 18 點 |
標準授權 | 1936 x 2581 px | JPG | 20 點 |
標準授權 | 2449 x 3265 px | JPG | 22 點 |
標準授權 | 6240 x 8320 px | JPG | 23 點 |
標準授權 | 8825 x 11766 px | TIF | 39 點 |
進階授權 | 6240 x 8320 px | JPG | 88 點 |
進階授權 | 6240 x 8320 px | JPG | 88 點 |
進階授權 | 6240 x 8320 px | JPG | 88 點 |