An earthen tray full of nicely grown Cacti in our Roof Garden. Cacti show many adaptations to conserve water. Almost all cacti are succulents, meaning they have thickened, fleshy parts adapted to store water. Unlike many other succulents, the stem is the only part of most cacti where this vital process takes place. Most species of cacti have lost true leaves, retaining only spines, which are highly modified leaves. As well as defending against herbivores, spines help prevent water loss by reducing air flow close to the cactus and providing some shade. In the absence of leaves, enlarged stems carry out photosynthesis.
圖片編號:
191669670
拍攝者:
Supriyarina
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XS
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M
L
XL
MAX
TIFF
WEL
PEL
UEL
標準授權 | 480 x 360 px | JPG | 13 點 |
標準授權 | 800 x 600 px | JPG | 15 點 |
標準授權 | 2000 x 1500 px | JPG | 18 點 |
標準授權 | 2581 x 1936 px | JPG | 20 點 |
標準授權 | 3265 x 2449 px | JPG | 22 點 |
標準授權 | 6000 x 4500 px | JPG | 23 點 |
標準授權 | 8485 x 6364 px | TIF | 39 點 |
進階授權 | 6000 x 4500 px | JPG | 88 點 |
進階授權 | 6000 x 4500 px | JPG | 88 點 |
進階授權 | 6000 x 4500 px | JPG | 88 點 |