A collection of recent data suggests that plants use a web of fungal threads, mycorrhizal fungi, similar to the internet: to release chemical signals, send nutrients, and even communicate with plants far away. Plants under attack can warn other plants to put up their chemical defenses. Larger trees can provide nutrients to their seedlings. Douglas firs and paper birch trees can exchange carbon. 

There is also a fungal dark net.

"Some especially crafty plants might even alter the make-up of nearby fungal communities," writes BBC's Nic Fleming. "Studies have shown that spotted knapweed, slender wild oat and soft brome can all change the fungal make-up of soils. According to [researcher Kathryn Morris], this might allow them to better target rival species with toxic chemicals, by favouring the growth of fungi to which they can both connect."

Biologists are officially adopting the term "wood wide web".