A short description from the Earthdawn Gamemaster’s Guide, 3rd ed. (pp. 60-61)
On the Jungles and Forests
Records show that before the Scourge, tall trees with broad leaves
shut out the sunlight from the floor of Barsaive’s jungles and forests
and so kept them clear of underbrush. In our time, through some
combination of magic, intent, circumstance, and natural growth,
jungles and forests grow thick with low vegetation that weaves between
the tall trees, thriving with or without sunlight. Perhaps in reaction
to the barrenness of the Scourge, Barsaive’s jungles and forests now
teem with animal and plant life. ...
... The variety of plant life in these
jungles is astounding; questors of Jaspree estimate that thousands of
varieties of plants and trees grow within a single day’s ride in any
direction.
... As soon as a traveler cuts a
passage and leaves it behind, the trees and growth begin crowding in
again. Splashes of sunlight, beams of light so startlingly bright that
they look like fire burning its way through the dimness, sometimes
illuminate remnants of other explorers’ trails. The dense plant life
makes the jungle a dangerous place for Namegivers and all manner of
mundane creatures. Large predators often await their prey in branches
high above the jungle paths or in the shadow of underbrush. Often,
more vulnerable creatures use the abundant flora to hide. The air
echoes with bird song, the hum of insects, and the occasional roar of
larger animals challenging trespassers or warning off scavengers
hoping to share their kill. The temperature is the only comfortable
part of traveling through Barsaive’s forests and jungles; it is rarely
hot, and may even be cold during the rainy season. Among the great
trees, travelers can always find a dry spot to wait out the weather.
It continues with descriptions of the Servos Jungle, the Poison Forest and the Liaj Jungle (pp. 61-62), the Mist Swamps (pp. 72-73) and the Blood Wood (pp. 77-79).
If you are interested in Eartdawn 1st ed., the books that have info on Barsaive's jungles are the following:
An Explorer's Guide to Barsaive in the Barsaive Campaign Set (1st ed.) has a general description on jungles and forests (pp. 91-92), and specific info (pp. 99-103) on Bloodwood, the Liaj Jungle, the Mist Swamps, the Poison Forest and the Servos Jungle.
Eartdawn Survival Guide has both info on jungles and forests (pp. 31-45) and rules for survival therein.
Dragons has info on great dragons' lairs, and among these the Mist Swamps for Aban (pp. 63-64) and the Liaj for Usun (p. 102).
The Serpent River has info on the Servos (pp. 27-31).
The Blood Wood has info on the Blood Wood (who would have thought?).
The Ork Nation of Cara Fahd has info on the deep jungle around the ancient city of Cara Fahd (pp. 17, 91-92).
As for pictures and visuals, I'd search mixed forests for Blood Wood (with many thorny plants), dead forests of high trees for the Poison Forest, jungles for the Liaj and the Servos, and deep swamps for the Mist Swamps. Remember that though Barsaive corresponds to Ukraine, its southern reaches have warmer climates than their real-world counterparts, due probably to the proximity of Death's Sea and the Scarlet Sea. This would support the presence of jungles in this area.
