Platanus is a small genus of trees native to the Northern Hemisphere. They are the sole living members of the family Platanaceae. The hybrid London Plane has proved particularly tolerant of urban conditions. They are known as planes or plane trees. The flowers are reduced and are borne in balls (globose head); 3ââ¬â7 hairy sepals may be fused at base, and the petals are 3ââ¬â7 (or no) and spathulate. Male and female flowers are separate, but on the same plant (monoecious). The number of heads in one cluster (inflorescence) is indicative of the species (see table below). The male flower has with 3ââ¬â8 stamens; the female has a superior ovary with 3ââ¬â7 carpels. Plane trees are wind-pollinated. Male flower-heads fall off the branch after shedding their pollen. They are known as planes or plane trees. Some are sometimes called sycamores (especially the North American Platanus occidentalis), although that term also refers to either the fig Ficus sycomorus, the plant originally so named, or the Great, or Sycamore Maple, Acer pseudoplatanus.
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12342871
拍攝者:
Urospetrovic
點數下載
授權類型 | 尺寸 | 像素 | 格式 | 點數 | |
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標準授權 | XS | 480 x 221 | JPG | 13 | |
標準授權 | S | 800 x 369 | JPG | 15 | |
標準授權 | M | 2551 x 1175 | JPG | 18 | |
標準授權 | L | 4140 x 1908 | JPG | 20 | |
標準授權 | XL | 4166 x 1920 | JPG | 22 | |
標準授權 | MAX | 5102 x 2351 | JPG | 23 | |
標準授權 | TIFF | 5855 x 2698 | TIF | 39 | |
進階授權 | WEL | 5102 x 2351 | JPG | 88 | |
進階授權 | PEL | 5102 x 2351 | JPG | 88 | |
進階授權 | UEL | 5102 x 2351 | JPG | 88 |
XS
S
M
L
XL
MAX
TIFF
WEL
PEL
UEL
標準授權 | 480 x 221 px | JPG | 13 點 |
標準授權 | 800 x 369 px | JPG | 15 點 |
標準授權 | 2551 x 1175 px | JPG | 18 點 |
標準授權 | 4140 x 1908 px | JPG | 20 點 |
標準授權 | 4166 x 1920 px | JPG | 22 點 |
標準授權 | 5102 x 2351 px | JPG | 23 點 |
標準授權 | 5855 x 2698 px | TIF | 39 點 |
進階授權 | 5102 x 2351 px | JPG | 88 點 |
進階授權 | 5102 x 2351 px | JPG | 88 點 |
進階授權 | 5102 x 2351 px | JPG | 88 點 |