No it’s not like really planting a cedar tree into some electronic device! But a research team at the American University of Beirut discovered that cedar tree shaped antennas are ideal for use in some wireless devices.
The team found that the geometry of the cedar, based on repetitive triangular parts, allows a cedar-shaped antenna to operate at multiple frequencies, which makes it suitable for many types of wireless devices such as mobile phones.
Karim Kabalan, professor and chairman of the Department of Electrical and Computer Engineering, was the mastermind behind the design, after two years of searching for an antenna that would be easy and inexpensive to fabricate and innovative, veering away from the usual rectangular and circular shapes. Source
The Lebanese Phalanges should be credited for the design though, it looks pretty much like their schematic cedar.
Thanks to @mkdubai