Top Ten Trees of the World: No. 8

Eighth on my list is Pinus Wallichiana: the Himalayan Pine.

A majestic tree growing up to 70 m tall with long, soft blue-green needles and large fresh green cones. It is native to the high mountains and temperate rainforests of China (Southern Tibet, Northwestern Yunnan), Afghanistan, Bhutan, Northern India, Kashmir, Myanmar, Nepal, Pakistan and Sikkim.

Pine pollen grains are very small, measuring approximately 100 microns in length (1 micron = 0.001 mm). We can see what they look like using a microscope. Pine pollen grains look a bit like Mickey Mouse to me – click here to see if you can work out why!

Click here for an image of Pine pollen taken using a Scanning Electron Microscope (SEM), a very powerful type of microscope. The image colours have been enhanced to highlight the air sacs on the pollen grain shown in white and the main body of the grain coloured green.